Clarify date format to use ISO 8601 standard

deimianvasquez · web-flow · commit 6da8d277b0f2 · 2026-03-31T00:50:23.000-04:00
Updated the date format hint to specify ISO 8601.
diff --git a/.learn/exercises/04.1-date-range/README.md b/.learn/exercises/04.1-date-range/README.md
@@ -15,4 +15,4 @@ DatetimeIndex(['2021-05-01', '2021-05-02', '2021-05-03', '2021-05-04',
 
 ## 💡 Hint:
 
-+ In the date format you can use `DD-MM-YYYY` or `YYYY-MM-DD`.
++ Use the date format `YYYY-MM-DD` (ISO 8601), as it is the standard and avoids confusion. Other formats may not work as expected.

Original file line number	Diff line number	Diff line change
`@@ -15,4 +15,4 @@ DatetimeIndex(['2021-05-01', '2021-05-02', '2021-05-03', '2021-05-04',`
`15`	`15`
`16`	`16`	`## 💡 Hint:`
`17`	`17`
`18`		-+ In the date format you can use `DD-MM-YYYY` or `YYYY-MM-DD`.
	`18`	++ Use the date format `YYYY-MM-DD` (ISO 8601), as it is the standard and avoids confusion. Other formats may not work as expected.