diff --git a/lywsd02/client.py b/lywsd02/client.py
index cddc1c1..248c687 100644
--- a/lywsd02/client.py
+++ b/lywsd02/client.py
@@ -116,7 +116,7 @@ def time(self, dt: datetime):
     def tz_offset(self):
         if self._tz_offset is not None:
             return self._tz_offset
-        elif time.daylight:
+        elif time.localtime().tm_isdst > 0:
             return -time.altzone // 3600
         else:
             return -time.timezone // 3600