diff --git a/shared/domain/activityField/activityField.ts b/shared/domain/activityField/activityField.ts
index 7ddc7a901..1d3454401 100644
--- a/shared/domain/activityField/activityField.ts
+++ b/shared/domain/activityField/activityField.ts
@@ -88,9 +88,10 @@ export abstract class ActivityBase {
                 break;
             }
             case ACTIVITY_TIME_TYPE.DATE_TIME: {
-                this.beginTime = moment(activityData.beginTime).startOf('d').add(REFRESH_TIME, 'h').valueOf();
-                this.endTime = moment(activityData.endTime).startOf('d').add(REFRESH_TIME, 'h').valueOf();
-                this.todayIndex = deltaDays(moment(this.beginTime).toDate(), new Date) + 1;
+                this.beginTime = activityData.beginTime.valueOf();
+                this.endTime = activityData.endTime.valueOf();
+                let startOfBeginDay = moment(activityData.beginTime).startOf('d').add(REFRESH_TIME, 'h');
+                this.todayIndex = deltaDays(startOfBeginDay.toDate(), new Date) + 1;
 
                 break;
             }