diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index c1fee37610..76a312cd91 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -271,8 +271,11 @@ static int32_t cfgSetTimezone(SConfigItem *pItem, const char *value, ECfgSrcType
            cfgStypeStr(stype), value, terrstr());
     return -1;
   }
-
   pItem->stype = stype;
+
+  // apply new timezone
+  osSetTimezone(value);
+
   return 0;
 }