From a0b7bc3f02503afe707572ee90e18d5b1fc55a9f Mon Sep 17 00:00:00 2001
From: urmipoddar <123488997+urmipoddar@users.noreply.github.com>
Date: Tue, 4 Aug 2026 11:16:48 -0400
Subject: [PATCH] Fix link text for 1900 date system reference

---
 episodes/03-dates-as-data.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/episodes/03-dates-as-data.md b/episodes/03-dates-as-data.md
index f1f88c36..e511172e 100644
--- a/episodes/03-dates-as-data.md
+++ b/episodes/03-dates-as-data.md
@@ -112,7 +112,7 @@ from before and after this date, Excel will translate only the post-1900 dates i
 If you're working with historic data, be extremely careful with your dates!
 
 Excel also entertains a second date system, the 1904 date system, as the default in Excel for Macintosh. This system will assign a
-different serial number than the [1900 date system](https://support.microsoft.com/en-us/help/214330/differences-between-the-1900-and-the-1904-date-system-in-excel). Because of this,
+different serial number than the [1900 date system](https://support.microsoft.com/en-us/excel/date-systems-in-excel). Because of this,
 [dates must be checked for accuracy when exporting data from Excel](https://uc3.cdlib.org/2014/04/09/abandon-all-hope-ye-who-enter-dates-in-excel/) (look for dates that are ~4 years off).
 
 ## Date formats in spreadsheets