diff --git a/chinese_calendar/constants.py b/chinese_calendar/constants.py
index b27b37a..6bfb4b8 100644
--- a/chinese_calendar/constants.py
+++ b/chinese_calendar/constants.py
@@ -868,7 +868,7 @@ def __new__(cls, english, chinese, days):
     datetime.date(year=2024, month=4, day=5): Holiday.tomb_sweeping_day.value,
     datetime.date(year=2024, month=5, day=2): Holiday.labour_day.value,
     datetime.date(year=2024, month=5, day=3): Holiday.labour_day.value,
-    datetime.date(year=2024, month=9, day=17): Holiday.mid_autumn_festival.value,
+    datetime.date(year=2024, month=9, day=16): Holiday.mid_autumn_festival.value,
     datetime.date(year=2024, month=10, day=4): Holiday.national_day.value,
     datetime.date(year=2024, month=10, day=7): Holiday.national_day.value,
 }