diff --git a/worldsrv/clock.go b/worldsrv/clock.go
index 7bd48d7..63b3ea6 100644
--- a/worldsrv/clock.go
+++ b/worldsrv/clock.go
@@ -3,6 +3,7 @@ package main
 import (
 	"time"
 
+	"mongo.games.com/game/common"
 	"mongo.games.com/goserver/core/module"
 )
 
@@ -114,9 +115,9 @@ func (this *ClockMgr) Update() {
 					this.LastDay = day
 					this.fireDayEvent()
 
-					_, week := tNow.ISOWeek()
-					if week != this.LastWeek {
-						this.LastWeek = week
+					week := common.GetWeekStartTs(tNow.Unix())
+					if week != int64(this.LastWeek) {
+						this.LastWeek = int(week)
 						this.fireWeekEvent()
 					}