diff --git a/trading_calendars/exchange_calendar_xshg.py b/trading_calendars/exchange_calendar_xshg.py
index 5fd75dba..91435db6 100644
--- a/trading_calendars/exchange_calendar_xshg.py
+++ b/trading_calendars/exchange_calendar_xshg.py
@@ -403,6 +403,7 @@
     "2020-01-28",
     "2020-01-29",
     "2020-01-30",
+    "2020-01-31",
     "2020-04-06",
     "2020-05-01",
     "2020-05-04",