diff --git a/holidays_detailed.yml b/holidays_detailed.yml
index 5ea7fa3..bc95af2 100644
--- a/holidays_detailed.yml
+++ b/holidays_detailed.yml
@@ -4764,7 +4764,7 @@
   name: 建国記念の日
   name_en: National Foundation Day
 2021-02-23:
-  date: 2021-12-23
+  date: 2021-02-23
   week: 火
   week_en: Tuesday
   name: 天皇誕生日