diff --git a/components/committee/CommitteeInterviewTimes.tsx b/components/committee/CommitteeInterviewTimes.tsx
index 88a98947..e05ceece 100644
--- a/components/committee/CommitteeInterviewTimes.tsx
+++ b/components/committee/CommitteeInterviewTimes.tsx
@@ -63,8 +63,8 @@ const CommitteeInterviewTimes = ({
   useEffect(() => {
     if (period) {
       setVisibleRange({
-        start: new Date(period!.interviewPeriod.start).toISOString(),
-        end: new Date(period!.interviewPeriod.end).toISOString(),
+        start: period.interviewPeriod.start.toISOString(),
+        end: period.interviewPeriod.end.toISOString(),
       });
     }
   }, [period]);
@@ -101,8 +101,8 @@ const CommitteeInterviewTimes = ({
           (at: any) => ({
             id: crypto.getRandomValues(new Uint32Array(1))[0].toString(),
             title: at.room,
-            start: new Date(at.start).toISOString(),
-            end: new Date(at.end).toISOString(),
+            start: at.start instanceof Date ? at.start.toISOString() : at.start,
+            end: at.end instanceof Date ? at.end.toISOString() : at.end,
           })
         );
 
@@ -317,10 +317,9 @@ const CommitteeInterviewTimes = ({
   }, [period]);
 
   const getSubmissionDeadline = (): string => {
-    const deadlineIso = period!.applicationPeriod.end;
+    const deadlineDate = period!.applicationPeriod.end;
 
-    if (deadlineIso != null && !deadLineHasPassed) {
-      const deadlineDate = new Date(deadlineIso);
+    if (deadlineDate != null && !deadLineHasPassed) {
       const now = new Date();
 
       if (now > deadlineDate) {
diff --git a/components/committee/Schedule.tsx b/components/committee/Schedule.tsx
index 0b9f4c43..668919fd 100644
--- a/components/committee/Schedule.tsx
+++ b/components/committee/Schedule.tsx
@@ -18,9 +18,9 @@ interface TimeSlot {
   available: boolean;
 }
 
-interface IsoTimeSlot {
-  start: string;
-  end: string;
+interface DateTimeSlot {
+  start: Date;
+  end: Date;
 }
 
 export default function Schedule({
@@ -37,14 +37,24 @@ export default function Schedule({
     periodTime: any,
   ): { [date: string]: string } => {
     if (!periodTime) return {};
-    const startDate = new Date(periodTime.start);
+    const startDate = new Date(
+      (periodTime.start instanceof Date
+        ? periodTime.start
+        : new Date(periodTime.start)
+      ).getTime(),
+    );
     startDate.setHours(startDate.getHours() + 2);
-    const endDate = new Date(periodTime.end);
+    const endDate = new Date(
+      (periodTime.end instanceof Date
+        ? periodTime.end
+        : new Date(periodTime.end)
+      ).getTime(),
+    );
     endDate.setHours(endDate.getHours() + 2);
     const dates: { [date: string]: string } = {};
     const dayNames = ["Søn", "Man", "Tir", "Ons", "Tor", "Fre", "Lør"];
 
-    let currentDate = new Date(startDate);
+    let currentDate = new Date(startDate.getTime());
 
     while (currentDate <= endDate) {
       const dayIndex = currentDate.getDay();
@@ -72,8 +82,8 @@ export default function Schedule({
     return [hour, minute];
   }, []);
 
-  const convertToIso = useCallback(
-    (date: string, timeSlot: string): IsoTimeSlot => {
+  const convertToDateSlot = useCallback(
+    (date: string, timeSlot: string): DateTimeSlot => {
       const [startTimeStr, endTimeStr] = timeSlot.split(" - ");
       const [year, month, day] = date.split("-").map(Number);
 
@@ -88,8 +98,8 @@ export default function Schedule({
       );
 
       return {
-        start: startTime.toISOString(),
-        end: endTime.toISOString(),
+        start: startTime,
+        end: endTime,
       };
     },
     [parseTime],
@@ -118,13 +128,13 @@ export default function Schedule({
       });
     });
 
-    const isoTimeSlotsForExport = allAvailableTimes.map((slot) =>
-      convertToIso(slot.date, slot.time),
+    const dateTimeSlotsForExport = allAvailableTimes.map((slot) =>
+      convertToDateSlot(slot.date, slot.time),
     );
 
     setApplicationData((prevData: any) => ({
       ...prevData,
-      selectedTimes: isoTimeSlotsForExport,
+      selectedTimes: dateTimeSlotsForExport,
     }));
     setIsInitialized(true);
   }, [
@@ -132,7 +142,7 @@ export default function Schedule({
     applicationData.selectedTimes,
     periodTime,
     timeSlots,
-    convertToIso,
+    convertToDateSlot,
     setApplicationData,
   ]);
 
@@ -185,12 +195,12 @@ export default function Schedule({
         });
       });
 
-      const isoTimeSlotsForExport = dataToSend.map((slot) =>
-        convertToIso(slot.date, slot.time),
+      const dateTimeSlotsForExport = dataToSend.map((slot) =>
+        convertToDateSlot(slot.date, slot.time),
       );
 
       // Queue the update instead of calling setApplicationData directly
-      setPendingUpdate(isoTimeSlotsForExport);
+      setPendingUpdate(dateTimeSlotsForExport);
 
       return newCells;
     });
@@ -198,13 +208,17 @@ export default function Schedule({
 
   const dates = getDatesWithinPeriod(periodTime);
 
-  let weekDates: { [date: string]: IsoTimeSlot[] } = {};
+  let weekDates: { [date: string]: DateTimeSlot[] } = {};
 
   Object.keys(dates).forEach((date) => {
     weekDates[date] = [];
     applicationData.selectedTimes?.forEach((slot) => {
-      if (slot?.start?.includes(date) && slot?.end) {
-        weekDates[date].push({ start: slot.start, end: slot.end });
+      if (slot?.start && slot?.end) {
+        const start = new Date(slot.start as unknown as string | number | Date);
+        const end = new Date(slot.end as unknown as string | number | Date);
+        if (start.toISOString().includes(date)) {
+          weekDates[date].push({ start, end });
+        }
       }
     });
   });
diff --git a/components/committee/ScheduleColumn.tsx b/components/committee/ScheduleColumn.tsx
index 3025ff05..5348e819 100644
--- a/components/committee/ScheduleColumn.tsx
+++ b/components/committee/ScheduleColumn.tsx
@@ -7,7 +7,7 @@ interface Props {
   date: string;
   weekDay: string;
   interviewLength: number;
-  availableSlots: { start: string; end: string }[];
+  availableSlots: { start: Date; end: Date }[];
   onToggleAvailability: (
     date: string,
     time: string,
@@ -27,13 +27,7 @@ export default function ScheduleColumn({
   const dateOfMonth = date.split("-")[2];
   const month = date.split("-")[1];
 
-  const adjustedAvailableSlots = availableSlots.map((slot) => {
-    slot.start = slot.start.replace("Z", "");
-    slot.end = slot.end.replace("Z", "");
-    return slot;
-  });
-
-  const availableTimeSlots = convertIsoToScheduleFormat(adjustedAvailableSlots);
+  const availableTimeSlots = convertIsoToScheduleFormat(availableSlots);
   const availableTimes = availableTimeSlots.map((slot) => {
     let [firstTime, secondTime] = slot.time.split(" - ").map((s) => s.trim());
     return `${firstTime} - ${secondTime}`;
diff --git a/components/form/DatePickerInput.tsx b/components/form/DatePickerInput.tsx
index 6ef4474c..a6adc6f7 100644
--- a/components/form/DatePickerInput.tsx
+++ b/components/form/DatePickerInput.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useState } from "react";
 interface Props {
   label?: string;
-  updateDates: (dates: { start: string; end: string }) => void;
+  updateDates: (dates: { start: Date | null; end: Date | null }) => void;
 }
 
 const DatePickerInput = (props: Props) => {
@@ -9,9 +9,9 @@ const DatePickerInput = (props: Props) => {
   const [toDate, setToDate] = useState("");
 
   useEffect(() => {
-    const startDate = fromDate ? `${fromDate}T00:00` : "";
-    const endDate = toDate ? `${toDate}T23:59` : "";
-    props.updateDates({ start: startDate, end: endDate });
+    const start = fromDate ? new Date(`${fromDate}T00:00`) : null;
+    const end = toDate ? new Date(`${toDate}T23:59`) : null;
+    props.updateDates({ start, end });
   }, [fromDate, toDate]);
 
   return (
diff --git a/lib/api/applicantApi.ts b/lib/api/applicantApi.ts
index a8166e6e..5df8620e 100644
--- a/lib/api/applicantApi.ts
+++ b/lib/api/applicantApi.ts
@@ -1,21 +1,34 @@
 import { QueryFunctionContext } from "@tanstack/react-query";
 import { applicantType } from "../types/types";
+import { parseApplicantDates } from "../utils/parseDates";
 
 export const fetchApplicantByPeriodAndId = async (
   context: QueryFunctionContext
 ) => {
   const periodId = context.queryKey[1];
   const applicantId = context.queryKey[2];
-  return fetch(`/api/applicants/${periodId}/${applicantId}`).then((res) =>
-    res.json()
+  const data = await fetch(`/api/applicants/${periodId}/${applicantId}`).then(
+    (res) => res.json()
   );
+  return {
+    ...data,
+    application: data.application
+      ? parseApplicantDates(data.application)
+      : undefined,
+  };
 };
 
 export const fetchApplicantsByPeriodId = async (
   context: QueryFunctionContext
 ) => {
   const periodId = context.queryKey[1];
-  return fetch(`/api/applicants/${periodId}`).then((res) => res.json());
+  const data = await fetch(`/api/applicants/${periodId}`).then((res) =>
+    res.json()
+  );
+  return {
+    ...data,
+    applications: data.applications?.map(parseApplicantDates),
+  };
 };
 
 export const fetchApplicantsByPeriodIdAndCommittee = async (
@@ -23,9 +36,13 @@ export const fetchApplicantsByPeriodIdAndCommittee = async (
 ) => {
   const periodId = context.queryKey[1];
   const committee = context.queryKey[2];
-  return fetch(`/api/committees/applicants/${periodId}/${committee}`).then(
-    (res) => res.json()
-  );
+  const data = await fetch(
+    `/api/committees/applicants/${periodId}/${committee}`
+  ).then((res) => res.json());
+  return {
+    ...data,
+    applicants: data.applicants?.map(parseApplicantDates),
+  };
 };
 
 export const createApplicant = async (applicant: applicantType) => {
diff --git a/lib/api/committeesApi.ts b/lib/api/committeesApi.ts
index a4fbe4c5..560cf0b4 100644
--- a/lib/api/committeesApi.ts
+++ b/lib/api/committeesApi.ts
@@ -1,5 +1,6 @@
 import { QueryFunctionContext } from "@tanstack/react-query";
 import { OwGroup } from "../types/types";
+import { parseCommitteeDates } from "../utils/parseDates";
 
 export const fetchOwCommittees = async (): Promise<OwGroup[]> => {
   return fetch(`/api/periods/ow-committees`).then((res) => res.json());
@@ -9,7 +10,11 @@ export const fetchCommitteeTimes = async (context: QueryFunctionContext) => {
   const periodId = context.queryKey[1];
   const committee = context.queryKey[2];
 
-  return fetch(`/api/committees/times/${periodId}/${committee}`).then((res) =>
-    res.json(),
-  );
+  const data = await fetch(
+    `/api/committees/times/${periodId}/${committee}`,
+  ).then((res) => res.json());
+  return {
+    ...data,
+    committees: data.committees?.map(parseCommitteeDates),
+  };
 };
diff --git a/lib/api/periodApi.ts b/lib/api/periodApi.ts
index a5662f53..62b15bdf 100644
--- a/lib/api/periodApi.ts
+++ b/lib/api/periodApi.ts
@@ -1,13 +1,22 @@
 import { QueryFunctionContext } from "@tanstack/react-query";
 import { periodType } from "../types/types";
+import { parsePeriodDates } from "../utils/parseDates";
 
 export const fetchPeriodById = async (context: QueryFunctionContext) => {
   const id = context.queryKey[1];
-  return fetch(`/api/periods/${id}`).then((res) => res.json());
+  const data = await fetch(`/api/periods/${id}`).then((res) => res.json());
+  return {
+    ...data,
+    period: data.period ? parsePeriodDates(data.period) : undefined,
+  };
 };
 
 export const fetchPeriods = async () => {
-  return fetch(`/api/periods`).then((res) => res.json());
+  const data = await fetch(`/api/periods`).then((res) => res.json());
+  return {
+    ...data,
+    periods: data.periods?.map(parsePeriodDates),
+  };
 };
 
 export const deletePeriodById = async (id: string) => {
diff --git a/lib/mongo/applicants.ts b/lib/mongo/applicants.ts
index f76814ee..44427d49 100644
--- a/lib/mongo/applicants.ts
+++ b/lib/mongo/applicants.ts
@@ -193,16 +193,16 @@ export const getApplicantsForCommittee = async (
           userCommittees.includes(preference),
         );
 
-        // Skjuler søkerinformasjon for komitéen etter syv dager etter intervjuperioden
+        // Skjuler søkerinformasjon for komitéen etter fem dager etter intervjuperioden
         const today = new Date();
-        const sevenDaysAfterInterviewEnd = new Date(period.interviewPeriod.end);
-        sevenDaysAfterInterviewEnd.setDate(
-          sevenDaysAfterInterviewEnd.getDate() + 5,
+        const fiveDaysAfterInterviewEnd = new Date(period.interviewPeriod.end.getTime());
+        fiveDaysAfterInterviewEnd.setDate(
+          fiveDaysAfterInterviewEnd.getDate() + 5,
         );
 
         if (
-          new Date(period.applicationPeriod.end) > today ||
-          today > sevenDaysAfterInterviewEnd
+          period.applicationPeriod.end > today ||
+          today > fiveDaysAfterInterviewEnd
         ) {
           applicant.owId = "Skjult";
           applicant.name = "Skjult";
@@ -211,7 +211,7 @@ export const getApplicantsForCommittee = async (
           applicant.email = "Skjult";
           applicant.about = "Skjult";
           applicant.grade = "-";
-          applicant.selectedTimes = [{ start: "Skjult", end: "Skjult" }];
+          applicant.selectedTimes = [{ start: new Date(0), end: new Date(0) }];
         }
 
         const isSelectedCommitteePresent =
diff --git a/lib/mongo/periods.ts b/lib/mongo/periods.ts
index dc651a61..36b9d7bd 100644
--- a/lib/mongo/periods.ts
+++ b/lib/mongo/periods.ts
@@ -59,17 +59,15 @@ export const getCurrentPeriods = async () => {
   try {
     if (!periods) await init();
 
-    const currentDate = new Date().toISOString();
+    const currentDate = new Date();
 
     const filter = {
       $or: [
         {
-          // Check if current ISO date string is within the application period
           "applicationPeriod.start": { $lte: currentDate },
           "applicationPeriod.end": { $gte: currentDate },
         },
         {
-          // Check if current ISO date string is within the interview period
           "interviewPeriod.start": { $lte: currentDate },
           "interviewPeriod.end": { $gte: currentDate },
         },
diff --git a/lib/types/types.ts b/lib/types/types.ts
index 11ef3693..b8637f2c 100644
--- a/lib/types/types.ts
+++ b/lib/types/types.ts
@@ -23,8 +23,8 @@ export type applicantType = {
   optionalCommittees: string[];
   selectedTimes: [
     {
-      start: string;
-      end: string;
+      start: Date;
+      end: Date;
     },
   ];
   date: Date;
@@ -67,8 +67,8 @@ export type periodType = {
 };
 
 export type AvailableTime = {
-  start: string;
-  end: string;
+  start: Date;
+  end: Date;
   room: string;
 };
 
diff --git a/lib/utils/convertIsoToScheduleFormat.ts b/lib/utils/convertIsoToScheduleFormat.ts
index c19cd532..f8468aa1 100644
--- a/lib/utils/convertIsoToScheduleFormat.ts
+++ b/lib/utils/convertIsoToScheduleFormat.ts
@@ -1,6 +1,6 @@
-interface IsoTimeSlot {
-  start: string;
-  end: string;
+interface TimeSlot {
+  start: Date;
+  end: Date;
 }
 
 interface ScheduleTimeSlot {
@@ -9,24 +9,24 @@ interface ScheduleTimeSlot {
 }
 
 export const convertIsoToScheduleFormat = (
-  isoTimeSlots: IsoTimeSlot[],
+  timeSlots: TimeSlot[],
 ): ScheduleTimeSlot[] => {
-  return isoTimeSlots.map((slot) => {
-    const startDate = new Date(slot.start);
-    const endDate = new Date(slot.end);
+  return timeSlots.map((slot) => {
+    const startDate = slot.start;
+    const endDate = slot.end;
 
     // Convert date to YYYY-MM-DD format
     const date = startDate.toISOString().split("T")[0];
 
     // Convert times to HH:MM format
-    const startTime = startDate.toLocaleTimeString([], {
+    const timeFormat: Intl.DateTimeFormatOptions = {
       hour: "2-digit",
       minute: "2-digit",
-    });
-    const endTime = endDate.toLocaleTimeString([], {
-      hour: "2-digit",
-      minute: "2-digit",
-    });
+      hour12: false,
+      timeZone: "Europe/Oslo",
+    };
+    const startTime = startDate.toLocaleTimeString("nb-NO", timeFormat);
+    const endTime = endDate.toLocaleTimeString("nb-NO", timeFormat);
 
     const time = `${startTime} - ${endTime}`;
 
diff --git a/lib/utils/dateUtils.ts b/lib/utils/dateUtils.ts
index 8ab5de14..198c9cce 100644
--- a/lib/utils/dateUtils.ts
+++ b/lib/utils/dateUtils.ts
@@ -1,55 +1,54 @@
 export const formatDate = (inputDate: undefined | Date) => {
-  const date = new Date(inputDate || "");
+  if (!inputDate) return "";
 
-  const day = date.getDate().toString().padStart(2, "0");
-  const month = (date.getMonth() + 1).toString().padStart(2, "0");
-  const year = date.getFullYear();
-  const hours = date.getHours().toString().padStart(2, "0");
-  const minutes = date.getMinutes().toString().padStart(2, "0");
+  const date = inputDate instanceof Date ? inputDate : new Date(inputDate);
 
-  return `${day}.${month}.${year}`; //  - ${hours}:${minutes}
+  return date.toLocaleDateString("nb-NO", {
+    day: "2-digit",
+    month: "2-digit",
+    year: "numeric",
+    timeZone: "Europe/Oslo",
+  });
 };
 
 export const formatDateHours = (
-  start: string,
-  end: string
+  start: string | Date,
+  end: string | Date,
 ) => {
-  const startDate = new Date(Date.parse(start));
+  const startDate = start instanceof Date ? start : new Date(start);
+  const endDate = end instanceof Date ? end : new Date(end);
+
+  const timeFormat: Intl.DateTimeFormatOptions = {
+    hour: "2-digit",
+    minute: "2-digit",
+    hour12: false,
+    timeZone: "Europe/Oslo",
+  };
 
-  const startTime = start.split("T")[1].slice(0, 5);
-  const endTime = end.split("T")[1].slice(0, 5);
+  const startTime = startDate.toLocaleTimeString("nb-NO", timeFormat);
+  const endTime = endDate.toLocaleTimeString("nb-NO", timeFormat);
 
-  return `${formatDateNorwegian(
-    startDate
-  )}, ${startTime} til ${endTime}`;
+  return `${formatDateNorwegian(startDate)}, ${startTime} til ${endTime}`;
 };
 
 export const formatDateNorwegian = (inputDate?: Date | string) => {
   if (!inputDate) return "";
 
-  let date: Date;
-  if (inputDate instanceof Date) {
-    date = inputDate;
-  } else {
-    date = new Date(inputDate);
-  }
-
-  const day = date.getUTCDate().toString().padStart(2, "0");
-  const monthsNorwegian = [
-    "jan",
-    "feb",
-    "mar",
-    "apr",
-    "mai",
-    "jun",
-    "jul",
-    "aug",
-    "sep",
-    "okt",
-    "nov",
-    "des",
-  ];
-  const month = monthsNorwegian[date.getUTCMonth()];
+  const date = inputDate instanceof Date ? inputDate : new Date(inputDate);
+
+  const day = date
+    .toLocaleDateString("nb-NO", {
+      day: "2-digit",
+      timeZone: "Europe/Oslo",
+    })
+    .replace(".", "");
+
+  const month = date
+    .toLocaleDateString("nb-NO", {
+      month: "short",
+      timeZone: "Europe/Oslo",
+    })
+    .replace(".", "");
 
   return `${day}. ${month}`;
 };
diff --git a/lib/utils/parseDates.ts b/lib/utils/parseDates.ts
new file mode 100644
index 00000000..445baabd
--- /dev/null
+++ b/lib/utils/parseDates.ts
@@ -0,0 +1,58 @@
+import {
+  applicantType,
+  committeeInterviewType,
+  periodType,
+} from "../types/types";
+
+/**
+ * Parses date strings in a period object to Date objects.
+ * Used both server-side (after JSON.parse of req.body) and
+ * client-side (after fetch .json() response).
+ */
+export function parsePeriodDates(raw: any): periodType {
+  return {
+    ...raw,
+    applicationPeriod: {
+      start: new Date(raw.applicationPeriod.start),
+      end: new Date(raw.applicationPeriod.end),
+    },
+    interviewPeriod: {
+      start: new Date(raw.interviewPeriod.start),
+      end: new Date(raw.interviewPeriod.end),
+    },
+  };
+}
+
+/**
+ * Parses date strings in an applicant object to Date objects.
+ */
+export function parseApplicantDates(raw: any): applicantType {
+  return {
+    ...raw,
+    date: raw.date ? new Date(raw.date) : new Date(),
+    selectedTimes: Array.isArray(raw.selectedTimes)
+      ? raw.selectedTimes.map((t: any) => ({
+          start: new Date(t.start),
+          end: new Date(t.end),
+        }))
+      : [],
+  };
+}
+
+/**
+ * Parses date strings in a committee interview type to Date objects.
+ */
+export function parseCommitteeDates(
+  raw: any,
+): committeeInterviewType {
+  return {
+    ...raw,
+    availabletimes: Array.isArray(raw.availabletimes)
+      ? raw.availabletimes.map((t: any) => ({
+          start: new Date(t.start),
+          end: new Date(t.end),
+          room: t.room,
+        }))
+      : [],
+  };
+}
diff --git a/lib/utils/validateApplication.ts b/lib/utils/validateApplication.ts
index eada7a89..7d2b52d0 100644
--- a/lib/utils/validateApplication.ts
+++ b/lib/utils/validateApplication.ts
@@ -71,8 +71,8 @@ export const validateApplication = (applicationData: any) => {
   }
 
   for (const time of selectedTimes) {
-    const startTime = new Date(time.start);
-    const endTime = new Date(time.end);
+    const startTime = time.start instanceof Date ? time.start : new Date(time.start);
+    const endTime = time.end instanceof Date ? time.end : new Date(time.end);
     if (isNaN(startTime.getTime()) || isNaN(endTime.getTime())) {
       toast.error("Ugyldig start- eller sluttid");
       return false;
diff --git a/lib/utils/validators.ts b/lib/utils/validators.ts
index 390faa92..fe6fd7ae 100644
--- a/lib/utils/validators.ts
+++ b/lib/utils/validators.ts
@@ -70,14 +70,19 @@ export const isApplicantType = (
   const hasSelectedTimes =
     Array.isArray(applicant.selectedTimes) &&
     applicant.selectedTimes.every(
-      (time: { start: string; end: string }) =>
-        typeof time.start === "string" &&
-        typeof time.end === "string" &&
-        new Date(time.start) >= interviewPeriodStart &&
-        new Date(time.start) <= interviewPeriodEnd &&
-        new Date(time.end) <= interviewPeriodEnd &&
-        new Date(time.end) >= interviewPeriodStart &&
-        new Date(time.start) < new Date(time.end),
+      (time: { start: Date | string; end: Date | string }) => {
+        const start = new Date(time.start);
+        const end = new Date(time.end);
+        return (
+          !isNaN(start.getTime()) &&
+          !isNaN(end.getTime()) &&
+          start >= interviewPeriodStart &&
+          start <= interviewPeriodEnd &&
+          end <= interviewPeriodEnd &&
+          end >= interviewPeriodStart &&
+          start < end
+        );
+      },
     );
 
   const periodOptionalCommittees = period.optionalCommittees.map((committee) =>
@@ -122,8 +127,8 @@ export const validateCommittee = (data: any, period: periodType): boolean => {
     typeof data.timeslot === "string" &&
     Array.isArray(data.availabletimes) &&
     data.availabletimes.every(
-      (time: { start: string; end: string }) =>
-        typeof time.start === "string" && typeof time.end === "string",
+      (time: { start: Date; end: Date }) =>
+        time.start instanceof Date && time.end instanceof Date,
     );
 
   const isPeriodNameValid = data.periodId === String(period._id);
@@ -138,16 +143,19 @@ export const validateCommittee = (data: any, period: periodType): boolean => {
       return committee.toLowerCase() === data.committee.toLowerCase();
     });
 
+  const intStart = new Date(period.interviewPeriod.start);
+  const intEnd = new Date(period.interviewPeriod.end);
+
   const isWithinInterviewPeriod = data.availabletimes.every(
-    (time: { start: string; end: string }) => {
+    (time: { start: string | Date; end: string | Date }) => {
       const startTime = new Date(time.start);
       const endTime = new Date(time.end);
 
       return (
-        startTime >= new Date(period.interviewPeriod.start) &&
-        startTime <= new Date(period.interviewPeriod.end) &&
-        endTime <= new Date(period.interviewPeriod.end) &&
-        endTime >= new Date(period.interviewPeriod.start) &&
+        startTime >= intStart &&
+        startTime <= intEnd &&
+        endTime <= intEnd &&
+        endTime >= intStart &&
         startTime < endTime
       );
     },
diff --git a/package-lock.json b/package-lock.json
index 65f637f7..a9b4b2e4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -55,6 +55,7 @@
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/@alloc/quick-lru/-/quick-lru-5.2.0.tgz",
       "integrity": "sha512-UrcABB+4bUrFABwbluTIBErXwvbsU/V7TZWfmbgJfbkwiBuziS9gxdODUyuiecfdGQ85jglMW6juS3+z5TsKLw==",
+      "dev": true,
       "engines": {
         "node": ">=10"
       },
@@ -823,6 +824,7 @@
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
       "integrity": "sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==",
+      "dev": true,
       "dependencies": {
         "string-width": "^5.1.2",
         "string-width-cjs": "npm:string-width@^4.2.0",
@@ -839,6 +841,7 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
       "integrity": "sha512-n5M855fKb2SsfMIiFFoVrABHJC8QtHwVx+mHWP3QcEqBHYienj5dHSgjbxtC0WEZXYt4wcD6zrQElDPhFuZgfA==",
+      "dev": true,
       "engines": {
         "node": ">=12"
       },
@@ -850,6 +853,7 @@
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
       "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^6.0.1"
       },
@@ -864,6 +868,7 @@
       "version": "0.3.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.5.tgz",
       "integrity": "sha512-IzL8ZoEDIBRWEzlCcRhOaCupYyN5gdIK+Q6fbFdPDg6HqX6jpkItn7DFIpW9LQzXG6Df9sA7+OKnq0qlz/GaQg==",
+      "dev": true,
       "dependencies": {
         "@jridgewell/set-array": "^1.2.1",
         "@jridgewell/sourcemap-codec": "^1.4.10",
@@ -877,6 +882,7 @@
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
       "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
       "engines": {
         "node": ">=6.0.0"
       }
@@ -885,6 +891,7 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/@jridgewell/set-array/-/set-array-1.2.1.tgz",
       "integrity": "sha512-R8gLRTZeyp03ymzP/6Lil/28tGeGEzhx1q2k703KGWRAI1VdvPIXdG70VJc2pAMw3NA6JKL5hhFu1sJX0Mnn/A==",
+      "dev": true,
       "engines": {
         "node": ">=6.0.0"
       }
@@ -892,12 +899,14 @@
     "node_modules/@jridgewell/sourcemap-codec": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
-      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ=="
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
+      "dev": true
     },
     "node_modules/@jridgewell/trace-mapping": {
       "version": "0.3.25",
       "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.25.tgz",
       "integrity": "sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==",
+      "dev": true,
       "dependencies": {
         "@jridgewell/resolve-uri": "^3.1.0",
         "@jridgewell/sourcemap-codec": "^1.4.14"
@@ -1074,6 +1083,7 @@
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
       "integrity": "sha512-vq24Bq3ym5HEQm2NKCr3yXDwjc7vTsEThRDnkp2DK9p1uqLR+DHurm/NOTo0KG7HYHU7eppKZj3MyqYuMBf62g==",
+      "dev": true,
       "dependencies": {
         "@nodelib/fs.stat": "2.0.5",
         "run-parallel": "^1.1.9"
@@ -1086,6 +1096,7 @@
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.5.tgz",
       "integrity": "sha512-RkhPPp2zrqDAQA/2jNhnztcPAlv64XdhIp7a7454A5ovI7Bukxgt7MX7udwAu3zg1DcpPU0rz3VV1SeaqvY4+A==",
+      "dev": true,
       "engines": {
         "node": ">= 8"
       }
@@ -1094,6 +1105,7 @@
       "version": "1.2.8",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.8.tgz",
       "integrity": "sha512-oGB+UxlgWcgQkgwo8GcEGwemoTFt3FIO9ababBmaGwXIoBKZ+GTy0pP185beGg7Llih/NSHSV2XAs1lnznocSg==",
+      "dev": true,
       "dependencies": {
         "@nodelib/fs.scandir": "2.1.5",
         "fastq": "^1.6.0"
@@ -1114,6 +1126,7 @@
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
       "integrity": "sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==",
+      "dev": true,
       "optional": true,
       "engines": {
         "node": ">=14"
@@ -1741,18 +1754,6 @@
         "typescript": ">=5.7.2"
       }
     },
-    "node_modules/@trpc/server": {
-      "version": "11.6.0",
-      "resolved": "https://registry.npmjs.org/@trpc/server/-/server-11.6.0.tgz",
-      "integrity": "sha512-skTso0AWbOZck40jwNeYv++AMZXNWLUWdyk+pB5iVaYmEKTuEeMoPrEudR12VafbEU6tZa8HK3QhBfTYYHDCdg==",
-      "funding": [
-        "https://trpc.io/sponsor"
-      ],
-      "peer": true,
-      "peerDependencies": {
-        "typescript": ">=5.7.2"
-      }
-    },
     "node_modules/@trpc/tanstack-react-query": {
       "version": "11.6.0",
       "resolved": "https://registry.npmjs.org/@trpc/tanstack-react-query/-/tanstack-react-query-11.6.0.tgz",
@@ -2038,6 +2039,7 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -2046,6 +2048,7 @@
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "dev": true,
       "dependencies": {
         "color-convert": "^2.0.1"
       },
@@ -2059,12 +2062,14 @@
     "node_modules/any-promise": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-      "integrity": "sha512-7UvmKalWRt1wgjL1RrGxoSJW/0QZFIegpeGvZG9kjp8vrRu55XTHbwnqq2GpXm9uLbcuhxm3IqX9OB4MZR1b2A=="
+      "integrity": "sha512-7UvmKalWRt1wgjL1RrGxoSJW/0QZFIegpeGvZG9kjp8vrRu55XTHbwnqq2GpXm9uLbcuhxm3IqX9OB4MZR1b2A==",
+      "dev": true
     },
     "node_modules/anymatch": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
       "integrity": "sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==",
+      "dev": true,
       "dependencies": {
         "normalize-path": "^3.0.0",
         "picomatch": "^2.0.4"
@@ -2076,7 +2081,8 @@
     "node_modules/arg": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/arg/-/arg-5.0.2.tgz",
-      "integrity": "sha512-PYjyFOLKQ9y57JvQ6QLo8dAgNqswh8M1RMJYdQduT6xbWSgK36P/Z/v+p888pM69jMMfS8Xd8F6I1kQ/I9HUGg=="
+      "integrity": "sha512-PYjyFOLKQ9y57JvQ6QLo8dAgNqswh8M1RMJYdQduT6xbWSgK36P/Z/v+p888pM69jMMfS8Xd8F6I1kQ/I9HUGg==",
+      "dev": true
     },
     "node_modules/argparse": {
       "version": "2.0.1",
@@ -2348,12 +2354,14 @@
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
+      "dev": true
     },
     "node_modules/binary-extensions": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
       "integrity": "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==",
+      "dev": true,
       "engines": {
         "node": ">=8"
       },
@@ -2380,6 +2388,7 @@
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
       "integrity": "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==",
+      "dev": true,
       "dependencies": {
         "fill-range": "^7.1.1"
       },
@@ -2487,6 +2496,7 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/camelcase-css/-/camelcase-css-2.0.1.tgz",
       "integrity": "sha512-QOSvevhslijgYwRx6Rv7zKdMF8lbRmx+uQGx2+vDc+KI/eBnsy9kit5aj23AgGu3pa4t9AgwbnXWqS+iOY+2aA==",
+      "dev": true,
       "engines": {
         "node": ">= 6"
       }
@@ -2531,6 +2541,7 @@
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz",
       "integrity": "sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==",
+      "dev": true,
       "dependencies": {
         "anymatch": "~3.1.2",
         "braces": "~3.0.2",
@@ -2554,6 +2565,7 @@
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
       "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
+      "dev": true,
       "dependencies": {
         "is-glob": "^4.0.1"
       },
@@ -2575,6 +2587,7 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "dev": true,
       "dependencies": {
         "color-name": "~1.1.4"
       },
@@ -2585,7 +2598,8 @@
     "node_modules/color-name": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "dev": true
     },
     "node_modules/combined-stream": {
       "version": "1.0.8",
@@ -2603,6 +2617,7 @@
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
       "integrity": "sha512-NOKm8xhkzAjzFx8B2v5OAHT+u5pRQc2UCa2Vq9jYL/31o2wi9mxBA7LIFs3sV5VSC49z6pEhfbMULvShKj26WA==",
+      "dev": true,
       "engines": {
         "node": ">= 6"
       }
@@ -2639,6 +2654,7 @@
       "version": "7.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.5.tgz",
       "integrity": "sha512-ZVJrKKYunU38/76t0RMOulHOnUcbU9GbpWKAOZ0mhjr7CX6FVrH+4FrAapSOekrgFQ3f/8gwMEuIft0aKq6Hug==",
+      "dev": true,
       "dependencies": {
         "path-key": "^3.1.0",
         "shebang-command": "^2.0.0",
@@ -2662,7 +2678,8 @@
     "node_modules/csstype": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
-      "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="
+      "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
+      "dev": true
     },
     "node_modules/damerau-levenshtein": {
       "version": "1.0.8",
@@ -2825,7 +2842,8 @@
     "node_modules/didyoumean": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/didyoumean/-/didyoumean-1.2.2.tgz",
-      "integrity": "sha512-gxtyfqMg7GKyhQmb056K7M3xszy/myH8w+B4RT+QXBQsvAOdc3XymqDDPHx1BgPgsdAA5SIifona89YtRATDzw=="
+      "integrity": "sha512-gxtyfqMg7GKyhQmb056K7M3xszy/myH8w+B4RT+QXBQsvAOdc3XymqDDPHx1BgPgsdAA5SIifona89YtRATDzw==",
+      "dev": true
     },
     "node_modules/dir-glob": {
       "version": "3.0.1",
@@ -2842,7 +2860,8 @@
     "node_modules/dlv": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/dlv/-/dlv-1.1.3.tgz",
-      "integrity": "sha512-+HlytyjlPKnIG8XuRG8WvmBP8xs8P71y+SKKS6ZXWoEgLuePxtDoUEiH7WkdePWrQ5JBpE6aoVqfZfJUQkjXwA=="
+      "integrity": "sha512-+HlytyjlPKnIG8XuRG8WvmBP8xs8P71y+SKKS6ZXWoEgLuePxtDoUEiH7WkdePWrQ5JBpE6aoVqfZfJUQkjXwA==",
+      "dev": true
     },
     "node_modules/doctrine": {
       "version": "3.0.0",
@@ -2882,7 +2901,8 @@
     "node_modules/eastasianwidth": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/eastasianwidth/-/eastasianwidth-0.2.0.tgz",
-      "integrity": "sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA=="
+      "integrity": "sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==",
+      "dev": true
     },
     "node_modules/ecdsa-sig-formatter": {
       "version": "1.0.11",
@@ -2901,7 +2921,8 @@
     "node_modules/emoji-regex": {
       "version": "9.2.2",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
-      "integrity": "sha512-L18DaJsXSUk2+42pv8mLs5jJT2hqFkFE4j21wOmgbUqsZ2hL72NsUU785g9RXgo3s0ZNgVl42TiHp3ZtOv/Vyg=="
+      "integrity": "sha512-L18DaJsXSUk2+42pv8mLs5jJT2hqFkFE4j21wOmgbUqsZ2hL72NsUU785g9RXgo3s0ZNgVl42TiHp3ZtOv/Vyg==",
+      "dev": true
     },
     "node_modules/es-abstract": {
       "version": "1.23.3",
@@ -3565,6 +3586,7 @@
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.2.tgz",
       "integrity": "sha512-oX2ruAFQwf/Orj8m737Y5adxDQO0LAB7/S5MnxCdTNDd4p6BsyIVsv9JQsATbTSq8KHRpLwIHbVlUNatxd+1Ow==",
+      "dev": true,
       "dependencies": {
         "@nodelib/fs.stat": "^2.0.2",
         "@nodelib/fs.walk": "^1.2.3",
@@ -3580,6 +3602,7 @@
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
       "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
+      "dev": true,
       "dependencies": {
         "is-glob": "^4.0.1"
       },
@@ -3624,6 +3647,7 @@
       "version": "1.17.1",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.17.1.tgz",
       "integrity": "sha512-sRVD3lWVIXWg6By68ZN7vho9a1pQcN/WBFaAAsDDFzlJjvoGx0P8z7V1t72grFJfJhu3YPZBuu25f7Kaw2jN1w==",
+      "dev": true,
       "dependencies": {
         "reusify": "^1.0.4"
       }
@@ -3644,6 +3668,7 @@
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz",
       "integrity": "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==",
+      "dev": true,
       "dependencies": {
         "to-regex-range": "^5.0.1"
       },
@@ -3720,6 +3745,7 @@
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       "integrity": "sha512-HnLOCR3vjcY8beoNLtcjZ5/nxn2afmME6lhrDrebokqMap+XbeW8n9TXpPDOqdGK5qcI3oT0GKTW6wC7EMiVqA==",
+      "dev": true,
       "dependencies": {
         "eastasianwidth": "^0.2.0",
         "emoji-regex": "^9.2.2",
@@ -6215,6 +6285,7 @@
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "dev": true,
       "dependencies": {
         "emoji-regex": "^8.0.0",
         "is-fullwidth-code-point": "^3.0.0",
@@ -6227,12 +6298,14 @@
     "node_modules/string-width-cjs/node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "dev": true
     },
     "node_modules/string-width/node_modules/ansi-regex": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
       "integrity": "sha512-n5M855fKb2SsfMIiFFoVrABHJC8QtHwVx+mHWP3QcEqBHYienj5dHSgjbxtC0WEZXYt4wcD6zrQElDPhFuZgfA==",
+      "dev": true,
       "engines": {
         "node": ">=12"
       },
@@ -6244,6 +6317,7 @@
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
       "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^6.0.1"
       },
@@ -6353,6 +6427,7 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^5.0.1"
       },
@@ -6365,6 +6440,7 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^5.0.1"
       },
@@ -6424,6 +6500,7 @@
       "version": "3.35.0",
       "resolved": "https://registry.npmjs.org/sucrase/-/sucrase-3.35.0.tgz",
       "integrity": "sha512-8EbVDiu9iN/nESwxeSxDKe0dunta1GOlHufmSSXxMD2z2/tMZpDMpvXQGsc+ajGo8y2uYUmixaSRUc/QPoQ0GA==",
+      "dev": true,
       "dependencies": {
         "@jridgewell/gen-mapping": "^0.3.2",
         "commander": "^4.0.0",
@@ -6445,6 +6522,7 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
       "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
+      "dev": true,
       "dependencies": {
         "balanced-match": "^1.0.0"
       }
@@ -6453,6 +6531,7 @@
       "version": "10.4.5",
       "resolved": "https://registry.npmjs.org/glob/-/glob-10.4.5.tgz",
       "integrity": "sha512-7Bv8RF0k6xjo7d4A/PxYLbUCfb6c+Vpd2/mB2yRDlew7Jb5hEXiCD9ibfO7wpk8i4sevK6DFny9h7EYbM3/sHg==",
+      "dev": true,
       "dependencies": {
         "foreground-child": "^3.1.0",
         "jackspeak": "^3.1.2",
@@ -6472,6 +6551,7 @@
       "version": "9.0.5",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.5.tgz",
       "integrity": "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==",
+      "dev": true,
       "dependencies": {
         "brace-expansion": "^2.0.1"
       },
@@ -6509,6 +6589,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
       "integrity": "sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==",
+      "dev": true,
       "engines": {
         "node": ">= 0.4"
       },
@@ -6520,6 +6601,7 @@
       "version": "3.4.9",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.9.tgz",
       "integrity": "sha512-1SEOvRr6sSdV5IDf9iC+NU4dhwdqzF4zKKq3sAbasUWHEM6lsMhX+eNN5gkPx1BvLFEnZQEUFbXnGj8Qlp83Pg==",
+      "dev": true,
       "dependencies": {
         "@alloc/quick-lru": "^5.2.0",
         "arg": "^5.0.2",
@@ -6556,6 +6638,7 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/object-hash/-/object-hash-3.0.0.tgz",
       "integrity": "sha512-RSn9F68PjH9HqtltsSnqYC1XXoWe9Bju5+213R98cNGttag9q9yAOTzdbsqvIa7aNm5WffBZFpWYr2aWrklWAw==",
+      "dev": true,
       "engines": {
         "node": ">= 6"
       }
@@ -6564,6 +6647,7 @@
       "version": "6.1.2",
       "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.1.2.tgz",
       "integrity": "sha512-Q8qQfPiZ+THO/3ZrOrO0cJJKfpYCagtMUkXbnEfmgUjwXg6z/WBeOyS9APBBPCTSiDV+s4SwQGu8yFsiMRIudg==",
+      "dev": true,
       "dependencies": {
         "cssesc": "^3.0.0",
         "util-deprecate": "^1.0.2"
@@ -6582,6 +6666,7 @@
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
       "integrity": "sha512-RVZSIV5IG10Hk3enotrhvz0T9em6cyHBLkH/YAZuKqd8hRkKhSfCGIcP2KUY0EPxndzANBmNllzWPwak+bheSw==",
+      "dev": true,
       "dependencies": {
         "any-promise": "^1.0.0"
       }
@@ -6590,6 +6675,7 @@
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/thenify-all/-/thenify-all-1.6.0.tgz",
       "integrity": "sha512-RNxQH/qI8/t3thXJDwcstUO4zeqo64+Uy/+sNVRBx4Xn2OX+OZ9oP+iJnNFqplFra2ZUVeKCSa2oVWi3T4uVmA==",
+      "dev": true,
       "dependencies": {
         "thenify": ">= 3.1.0 < 4"
       },
@@ -6601,6 +6687,7 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
       "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
       "dependencies": {
         "is-number": "^7.0.0"
       },
@@ -6622,7 +6709,8 @@
     "node_modules/ts-interface-checker": {
       "version": "0.1.13",
       "resolved": "https://registry.npmjs.org/ts-interface-checker/-/ts-interface-checker-0.1.13.tgz",
-      "integrity": "sha512-Y/arvbn+rrz3JCKl9C4kVNfTfSm2/mEp5FSz5EsZSANGPSlQrpRI5M4PKF+mJnE52jOO90PnPSc3Ur3bTQw0gA=="
+      "integrity": "sha512-Y/arvbn+rrz3JCKl9C4kVNfTfSm2/mEp5FSz5EsZSANGPSlQrpRI5M4PKF+mJnE52jOO90PnPSc3Ur3bTQw0gA==",
+      "dev": true
     },
     "node_modules/tsconfig-paths": {
       "version": "3.15.0",
@@ -6780,6 +6868,7 @@
       "version": "5.9.2",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
       "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
+      "dev": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -6891,6 +6980,7 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
       "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "dev": true,
       "dependencies": {
         "isexe": "^2.0.0"
       },
@@ -6993,6 +7083,7 @@
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
       "integrity": "sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==",
+      "dev": true,
       "dependencies": {
         "ansi-styles": "^6.1.0",
         "string-width": "^5.0.1",
@@ -7010,6 +7101,7 @@
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
       "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
+      "dev": true,
       "dependencies": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -7025,12 +7117,14 @@
     "node_modules/wrap-ansi-cjs/node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "dev": true
     },
     "node_modules/wrap-ansi-cjs/node_modules/string-width": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "dev": true,
       "dependencies": {
         "emoji-regex": "^8.0.0",
         "is-fullwidth-code-point": "^3.0.0",
@@ -7044,6 +7138,7 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
       "integrity": "sha512-n5M855fKb2SsfMIiFFoVrABHJC8QtHwVx+mHWP3QcEqBHYienj5dHSgjbxtC0WEZXYt4wcD6zrQElDPhFuZgfA==",
+      "dev": true,
       "engines": {
         "node": ">=12"
       },
@@ -7055,6 +7150,7 @@
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.1.tgz",
       "integrity": "sha512-bN798gFfQX+viw3R7yrGWRqnrN2oRkEkUjjl4JNn4E8GxxbjtG3FbrEIIY3l8/hrwUwIeCZvi4QuOTP4MErVug==",
+      "dev": true,
       "engines": {
         "node": ">=12"
       },
@@ -7066,6 +7162,7 @@
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
       "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
+      "dev": true,
       "dependencies": {
         "ansi-regex": "^6.0.1"
       },
@@ -7099,6 +7196,7 @@
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.5.0.tgz",
       "integrity": "sha512-2wWLbGbYDiSqqIKoPjar3MPgB94ErzCtrNE1FdqGuaO0pi2JGjmE8aW8TDZwzU7vuxcGRdL/4gPQwQ7hD5AMSw==",
+      "dev": true,
       "bin": {
         "yaml": "bin.mjs"
       },
diff --git a/pages/admin/new-period.tsx b/pages/admin/new-period.tsx
index 5ac74cbd..b501b64e 100644
--- a/pages/admin/new-period.tsx
+++ b/pages/admin/new-period.tsx
@@ -84,14 +84,14 @@ const NewPeriod = () => {
     start,
     end,
   }: {
-    start: string;
-    end: string;
+    start: Date | null;
+    end: Date | null;
   }) => {
     setPeriodData((prevData) => ({
       ...prevData,
       applicationPeriod: {
-        start: start ? new Date(start) : undefined,
-        end: end ? new Date(end) : undefined,
+        start: start ?? undefined,
+        end: end ?? undefined,
       },
     }));
   };
@@ -100,14 +100,14 @@ const NewPeriod = () => {
     start,
     end,
   }: {
-    start: string;
-    end: string;
+    start: Date | null;
+    end: Date | null;
   }) => {
     setPeriodData((prevData) => ({
       ...prevData,
       interviewPeriod: {
-        start: start ? new Date(start) : undefined,
-        end: end ? new Date(end) : undefined,
+        start: start ?? undefined,
+        end: end ?? undefined,
       },
     }));
   };
diff --git a/pages/api/applicants/[period-id]/[id].ts b/pages/api/applicants/[period-id]/[id].ts
index 3c391e1b..f459f908 100644
--- a/pages/api/applicants/[period-id]/[id].ts
+++ b/pages/api/applicants/[period-id]/[id].ts
@@ -40,9 +40,7 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
       }
       return res.status(200).json({ exists, application });
     } else if (req.method === "DELETE") {
-      const currentDate = new Date().toISOString();
-
-      if (new Date(period.applicationPeriod.end) < new Date(currentDate)) {
+      if (period.applicationPeriod.end < new Date()) {
         return res.status(403).json({ error: "Application period is over" });
       }
 
diff --git a/pages/api/applicants/index.ts b/pages/api/applicants/index.ts
index a211142b..4886a537 100644
--- a/pages/api/applicants/index.ts
+++ b/pages/api/applicants/index.ts
@@ -12,6 +12,7 @@ import { isApplicantType } from "../../../lib/utils/validators";
 import { isAdmin, hasSession, checkOwId } from "../../../lib/utils/apiChecks";
 import { sendConfirmationSMS } from "../../../lib/sms/sendConfirmationSMS";
 import { sendConfirmationEmail } from "../../../lib/email/sendConfirmationEmail";
+import { parseApplicantDates } from "../../../lib/utils/parseDates";
 
 const handler = async (req: NextApiRequest, res: NextApiResponse) => {
   const session = await getServerSession(req, res, authOptions);
@@ -28,8 +29,8 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
     }
 
     if (req.method === "POST") {
-      const requestBody: applicantType = req.body;
-      requestBody.date = new Date(new Date().getTime() + 60 * 60 * 2000); // add date with norwegain time (GMT+2)
+      const requestBody = parseApplicantDates(req.body);
+      requestBody.date = new Date();
 
       const { period } = await getPeriodById(String(requestBody.periodId));
 
@@ -37,7 +38,7 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
         return res.status(400).json({ error: "Invalid period id" });
       }
 
-      if (!isApplicantType(req.body, period)) {
+      if (!isApplicantType(requestBody, period)) {
         return res.status(400).json({ error: "Invalid data format" });
       }
 
@@ -79,8 +80,8 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
     }
 
     if (req.method === "PUT") {
-      const requestBody: applicantType = req.body;
-      requestBody.date = new Date(new Date().getTime() + 60 * 60 * 2000); // add date with norwegian time (GMT+2). TODO: Fix workaround in #415
+      const requestBody = parseApplicantDates(req.body);
+      requestBody.date = new Date();
 
       // Remove _id field to prevent MongoDB immutable field error
       if ("_id" in requestBody) {
@@ -93,7 +94,7 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
         return res.status(400).json({ error: "Invalid period id" });
       }
 
-      if (!isApplicantType(req.body, period)) {
+      if (!isApplicantType(requestBody, period)) {
         return res.status(400).json({ error: "Invalid data format" });
       }
 
diff --git a/pages/api/committees/times/[period-id]/[committee].ts b/pages/api/committees/times/[period-id]/[committee].ts
index 573b31ed..cdddf2a4 100644
--- a/pages/api/committees/times/[period-id]/[committee].ts
+++ b/pages/api/committees/times/[period-id]/[committee].ts
@@ -50,7 +50,7 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
         return res.status(400).json({ error: "Invalid periodId" });
       }
 
-      if (new Date() > new Date(period.applicationPeriod.end)) {
+      if (new Date() > period.applicationPeriod.end) {
         return res.status(400).json({ error: "Application period has ended" });
       }
 
diff --git a/pages/api/committees/times/[period-id]/index.ts b/pages/api/committees/times/[period-id]/index.ts
index 297a0016..2570c8be 100644
--- a/pages/api/committees/times/[period-id]/index.ts
+++ b/pages/api/committees/times/[period-id]/index.ts
@@ -9,6 +9,7 @@ import {
 } from "../../../../../lib/utils/validators";
 import { getPeriodById } from "../../../../../lib/mongo/periods";
 import { committeeInterviewType } from "../../../../../lib/types/types";
+import { parseCommitteeDates } from "../../../../../lib/utils/parseDates";
 
 const handler = async (req: NextApiRequest, res: NextApiResponse) => {
   const session = await getServerSession(req, res, authOptions);
@@ -24,18 +25,18 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
   if (!isInCommitee(res, session)) return;
 
   if (req.method === "POST") {
-    const committeeData: committeeInterviewType = req.body;
-
     if (!isCommitteeType(req.body)) {
       return res.status(400).json({ error: "Invalid data format" });
     }
 
+    const committeeData = parseCommitteeDates(req.body);
+
     const { period } = await getPeriodById(String(committeeData.periodId));
     if (!period) {
       return res.status(400).json({ error: "Invalid periodId" });
     }
 
-    if (new Date() > new Date(period.applicationPeriod.end)) {
+    if (new Date() > period.applicationPeriod.end) {
       return res.status(400).json({ error: "Application period has ended" });
     }
 
diff --git a/pages/api/periods/index.ts b/pages/api/periods/index.ts
index 19064c26..46c691af 100644
--- a/pages/api/periods/index.ts
+++ b/pages/api/periods/index.ts
@@ -5,6 +5,7 @@ import { periodType } from "../../../lib/types/types";
 import { createPeriod, getPeriods } from "../../../lib/mongo/periods";
 import { hasSession, isAdmin } from "../../../lib/utils/apiChecks";
 import { isPeriodType } from "../../../lib/utils/validators";
+import { parsePeriodDates } from "../../../lib/utils/parseDates";
 
 const handler = async (req: NextApiRequest, res: NextApiResponse) => {
   const session = await getServerSession(req, res, authOptions);
@@ -22,12 +23,13 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
 
     if (req.method === "POST") {
       if (!isAdmin(res, session)) return;
-      const period = req.body as periodType;
 
       if (!isPeriodType(req.body)) {
         return res.status(400).json({ error: "Invalid data format" });
       }
 
+      const period = parsePeriodDates(req.body);
+
       const { error } = await createPeriod(period);
       if (error) throw new Error(error);
       return res.status(201).json({ message: "Period created successfully" });
diff --git a/pages/apply/[period-id].tsx b/pages/apply/[period-id].tsx
index 92d55b6a..5035e4c2 100644
--- a/pages/apply/[period-id].tsx
+++ b/pages/apply/[period-id].tsx
@@ -151,10 +151,7 @@ const Application: NextPage = () => {
 
     setPeriod(periodData.period);
 
-    const currentDate = new Date().toISOString();
-    if (
-      new Date(periodData.period.applicationPeriod.end) < new Date(currentDate)
-    ) {
+    if (periodData.period.applicationPeriod.end < new Date()) {
       setIsApplicationPeriodOver(true);
     }
   }, [periodData]);
diff --git a/pages/apply/index.tsx b/pages/apply/index.tsx
index 4a7867bf..80c7df29 100644
--- a/pages/apply/index.tsx
+++ b/pages/apply/index.tsx
@@ -28,18 +28,13 @@ const Apply = () => {
 
     setCurrentPeriods(
       periodsData.periods.filter((period: periodType) => {
-        const startDate = new Date(period.applicationPeriod.start || "");
-        const endDate = new Date(period.applicationPeriod.end || "");
-
-        return startDate <= today && endDate >= today;
+        return period.applicationPeriod.start <= today && period.applicationPeriod.end >= today;
       })
     );
 
     setUpcomingPeriods(
       periodsData.periods.filter((period: periodType) => {
-        const startDate = new Date(period.applicationPeriod.start || "");
-
-        return startDate >= today
+        return period.applicationPeriod.start >= today;
       })
     )
   }, [periodsData]);
diff --git a/pages/committee/[period-id]/[committee]/index.tsx b/pages/committee/[period-id]/[committee]/index.tsx
index b5f51989..ddf9ca10 100644
--- a/pages/committee/[period-id]/[committee]/index.tsx
+++ b/pages/committee/[period-id]/[committee]/index.tsx
@@ -82,9 +82,7 @@ const CommitteeApplicantOverview: NextPage = () => {
   if (periodIsError || interviewTimesIsError) return <ErrorPage />;
   if (!hasAccess) return <Custom404 />;
 
-  const interviewPeriodEnd = period?.interviewPeriod.end
-    ? new Date(period.interviewPeriod.end)
-    : null;
+  const interviewPeriodEnd = period?.interviewPeriod.end ?? null;
 
   // Satt frist til 14 dager etter intervju perioden, så får man ikke tilgang
   const interviewAccessExpired =
diff --git a/pages/committees.tsx b/pages/committees.tsx
index b658841c..97f1be2a 100644
--- a/pages/committees.tsx
+++ b/pages/committees.tsx
@@ -168,9 +168,7 @@ const committeeIsInActivePeriod = (
   const today = new Date();
 
   const activePeriods = periods.filter((period) => {
-    const applicationStart = new Date(period.applicationPeriod.start);
-    const applicationEnd = new Date(period.applicationPeriod.end);
-    return applicationStart <= today && applicationEnd >= today;
+    return period.applicationPeriod.start <= today && period.applicationPeriod.end >= today;
   });
 
   // Bankom is always active, since you can be a representative of bankom from each committee
@@ -194,9 +192,7 @@ const committeeIsCurrentlyInterviewing = (
   const today = new Date();
 
   const periodsWithInterviewsCurrently = periods.filter((period) => {
-    const interviewStart = new Date(period.interviewPeriod.start);
-    const interviewEnd = new Date(period.interviewPeriod.end);
-    return interviewStart <= today && interviewEnd >= today;
+    return period.interviewPeriod.start <= today && period.interviewPeriod.end >= today;
   });
 
   // Bankom is always active, since you can be a representative of bankom from each committee
diff --git a/scripts/migrate-dates.js b/scripts/migrate-dates.js
new file mode 100644
index 00000000..61ddc52d
--- /dev/null
+++ b/scripts/migrate-dates.js
@@ -0,0 +1,152 @@
+/**
+ * Migreringsscript: Konverterer streng-datoer til BSON Date i MongoDB.
+ *
+ * Kjør med: node scripts/migrate-dates.js
+ *
+ * Krever MONGODB_URI miljøvariabel (les fra .env.local eller sett manuelt).
+ *
+ * Alternativt kan du kjøre innholdet i migrateCollections() direkte i mongosh.
+ */
+
+const { MongoClient } = require("mongodb");
+const path = require("path");
+const fs = require("fs");
+
+// Forsøk å lese MONGODB_URI fra .env.local
+function loadEnv() {
+  const envPath = path.resolve(__dirname, "../.env.local");
+  if (fs.existsSync(envPath)) {
+    const content = fs.readFileSync(envPath, "utf-8");
+    for (const line of content.split("\n")) {
+      const trimmed = line.trim();
+      if (trimmed && !trimmed.startsWith("#")) {
+        const [key, ...rest] = trimmed.split("=");
+        if (key && rest.length > 0) {
+          process.env[key.trim()] = rest.join("=").trim();
+        }
+      }
+    }
+  }
+}
+
+loadEnv();
+
+const URI = process.env.MONGODB_URI;
+if (!URI) {
+  console.error("MONGODB_URI er ikke satt. Sett den i .env.local eller som miljøvariabel.");
+  process.exit(1);
+}
+
+async function migratePeriods(db) {
+  const periods = db.collection("periods");
+  const docs = await periods.find({}).toArray();
+  let updated = 0;
+
+  for (const doc of docs) {
+    const needsUpdate =
+      typeof doc.applicationPeriod?.start === "string" ||
+      typeof doc.applicationPeriod?.end === "string" ||
+      typeof doc.interviewPeriod?.start === "string" ||
+      typeof doc.interviewPeriod?.end === "string";
+
+    if (!needsUpdate) continue;
+
+    await periods.updateOne(
+      { _id: doc._id },
+      {
+        $set: {
+          "applicationPeriod.start": new Date(doc.applicationPeriod.start),
+          "applicationPeriod.end": new Date(doc.applicationPeriod.end),
+          "interviewPeriod.start": new Date(doc.interviewPeriod.start),
+          "interviewPeriod.end": new Date(doc.interviewPeriod.end),
+        },
+      }
+    );
+    updated++;
+  }
+
+  console.log(`periods: ${updated}/${docs.length} dokumenter oppdatert`);
+}
+
+async function migrateApplications(db) {
+  const applications = db.collection("applications");
+  const docs = await applications.find({}).toArray();
+  let updated = 0;
+
+  for (const doc of docs) {
+    if (!Array.isArray(doc.selectedTimes) || doc.selectedTimes.length === 0) continue;
+
+    const needsUpdate = doc.selectedTimes.some(
+      (t) => typeof t.start === "string" || typeof t.end === "string"
+    );
+
+    if (!needsUpdate) continue;
+
+    const updatedTimes = doc.selectedTimes.map((t) => ({
+      start: typeof t.start === "string" ? new Date(t.start) : t.start,
+      end: typeof t.end === "string" ? new Date(t.end) : t.end,
+    }));
+
+    await applications.updateOne(
+      { _id: doc._id },
+      { $set: { selectedTimes: updatedTimes } }
+    );
+    updated++;
+  }
+
+  console.log(`applications: ${updated}/${docs.length} dokumenter oppdatert`);
+}
+
+async function migrateCommittees(db) {
+  const committees = db.collection("committees");
+  const docs = await committees.find({}).toArray();
+  let updated = 0;
+
+  for (const doc of docs) {
+    if (!Array.isArray(doc.availabletimes) || doc.availabletimes.length === 0) continue;
+
+    const needsUpdate = doc.availabletimes.some(
+      (t) => typeof t.start === "string" || typeof t.end === "string"
+    );
+
+    if (!needsUpdate) continue;
+
+    const updatedTimes = doc.availabletimes.map((t) => ({
+      start: typeof t.start === "string" ? new Date(t.start) : t.start,
+      end: typeof t.end === "string" ? new Date(t.end) : t.end,
+      room: t.room,
+    }));
+
+    await committees.updateOne(
+      { _id: doc._id },
+      { $set: { availabletimes: updatedTimes } }
+    );
+    updated++;
+  }
+
+  console.log(`committees: ${updated}/${docs.length} dokumenter oppdatert`);
+}
+
+async function main() {
+  const client = new MongoClient(URI);
+
+  try {
+    await client.connect();
+    const db = client.db();
+
+    console.log("Starter migrering av datoer...\n");
+
+    await migratePeriods(db);
+    await migrateApplications(db);
+    await migrateCommittees(db);
+
+    console.log("\nMigrering fullført!");
+  } catch (error) {
+    console.error("Feil under migrering:", error);
+    process.exit(1);
+  } finally {
+    await client.close();
+  }
+}
+
+main();
diff --git a/scripts/migrate-to-new-db.js b/scripts/migrate-to-new-db.js
new file mode 100644
index 00000000..14a3235b
--- /dev/null
+++ b/scripts/migrate-to-new-db.js
@@ -0,0 +1,139 @@
+/**
+ * Bygger Date_dev som en migrert kopi av kilde-DB-en (fra MONGODB_URI)
+ * via aggregation + $out. Kilde-DB-en berøres ikke.
+ *
+ * Kjør med: node scripts/migrate-to-new-db.js
+ */
+
+const { MongoClient } = require("mongodb");
+const path = require("path");
+const fs = require("fs");
+
+function loadEnv() {
+  const envPath = path.resolve(__dirname, "../.env.local");
+  if (fs.existsSync(envPath)) {
+    const content = fs.readFileSync(envPath, "utf-8");
+    for (const line of content.split("\n")) {
+      const trimmed = line.trim();
+      if (trimmed && !trimmed.startsWith("#")) {
+        const [key, ...rest] = trimmed.split("=");
+        if (key && rest.length > 0) {
+          process.env[key.trim()] = rest.join("=").trim();
+        }
+      }
+    }
+  }
+}
+
+loadEnv();
+
+const URI = process.env.MONGODB_URI;
+if (!URI) {
+  console.error("MONGODB_URI er ikke satt. Sett den i .env.local eller som miljøvariabel.");
+  process.exit(1);
+}
+
+const TARGET_DB = "Date_dev";
+
+async function runPipeline(sourceDb, sourceColl, pipeline) {
+  await sourceDb.collection(sourceColl).aggregate(pipeline).toArray();
+}
+
+async function main() {
+  const client = new MongoClient(URI);
+
+  try {
+    await client.connect();
+    const sourceDb = client.db();
+    const targetDb = client.db(TARGET_DB);
+
+    console.log(`Kilde-DB: ${sourceDb.databaseName}`);
+    console.log(`Mål-DB:   ${TARGET_DB}\n`);
+
+    console.log("Migrerer periods...");
+    await runPipeline(sourceDb, "periods", [
+      {
+        $addFields: {
+          "applicationPeriod.start": { $toDate: "$applicationPeriod.start" },
+          "applicationPeriod.end": { $toDate: "$applicationPeriod.end" },
+          "interviewPeriod.start": { $toDate: "$interviewPeriod.start" },
+          "interviewPeriod.end": { $toDate: "$interviewPeriod.end" },
+        },
+      },
+      { $out: { db: TARGET_DB, coll: "periods" } },
+    ]);
+    console.log(
+      `  → ${TARGET_DB}.periods: ${await targetDb.collection("periods").countDocuments()} dokumenter\n`
+    );
+
+    console.log("Migrerer applications...");
+    await runPipeline(sourceDb, "applications", [
+      {
+        $addFields: {
+          selectedTimes: {
+            $map: {
+              input: "$selectedTimes",
+              as: "t",
+              in: {
+                start: { $toDate: "$$t.start" },
+                end: { $toDate: "$$t.end" },
+              },
+            },
+          },
+        },
+      },
+      { $out: { db: TARGET_DB, coll: "applications" } },
+    ]);
+    console.log(
+      `  → ${TARGET_DB}.applications: ${await targetDb.collection("applications").countDocuments()} dokumenter\n`
+    );
+
+    console.log("Migrerer committees...");
+    await runPipeline(sourceDb, "committees", [
+      {
+        $addFields: {
+          availabletimes: {
+            $map: {
+              input: "$availabletimes",
+              as: "t",
+              in: {
+                start: { $toDate: "$$t.start" },
+                end: { $toDate: "$$t.end" },
+                room: "$$t.room",
+              },
+            },
+          },
+        },
+      },
+      { $out: { db: TARGET_DB, coll: "committees" } },
+    ]);
+    console.log(
+      `  → ${TARGET_DB}.committees: ${await targetDb.collection("committees").countDocuments()} dokumenter\n`
+    );
+
+    console.log("Kopierer interviews...");
+    await runPipeline(sourceDb, "interviews", [
+      { $out: { db: TARGET_DB, coll: "interviews" } },
+    ]);
+    console.log(
+      `  → ${TARGET_DB}.interviews: ${await targetDb.collection("interviews").countDocuments()} dokumenter\n`
+    );
+
+    console.log("Kopierer rooms...");
+    await runPipeline(sourceDb, "rooms", [
+      { $out: { db: TARGET_DB, coll: "rooms" } },
+    ]);
+    console.log(
+      `  → ${TARGET_DB}.rooms: ${await targetDb.collection("rooms").countDocuments()} dokumenter\n`
+    );
+
+    console.log("Migrering fullført!");
+  } catch (error) {
+    console.error("Feil under migrering:", error);
+    process.exit(1);
+  } finally {
+    await client.close();
+  }
+}
+
+main();