I have Lumia 520 with WP8. I am using two calendars - Google and Exchange. I am in GMT+1 time zone and have this zone set everywhere (phone, Google, Exchange). We observe daylight saving. In summer time everything worked fine. When time switched to winter time all items I create on the phone in google calender change it's time by one hour (they start one hour sooner than inteded). It shows correct time for appx. 30 seconds and then it changes (I guess change happens after sync). Exchange calendar works fine. If I create item via web on Google Calendar it syncs fine and no change happens. Any ideas what's wrong and how to fix it?