DatePicker: timezone

packages/date-picker/src/basic/date-table.vue

@@ -33,7 +33,7 @@
   const clearHours = function(time) {
     const cloneDate = new Date(time);
     const timeZoneOffset = cloneDate.getTimezoneOffset();
-    const timeZone = timeZoneOffset >= 0 ? 24 - timeZoneOffset / 60 : timeZoneOffset / 60;
+    const timeZone = timeZoneOffset >= 0 ? 24 - timeZoneOffset / 60 : Math.abs(timeZoneOffset) / 60;
     cloneDate.setHours(timeZone, 0, 0, 0);
     return cloneDate.getTime();
   };