My Garmin 235 Forerunner doesnt show right time. Even after sync, watch shows 77 minut less time than it really is. And I dont want to set the time manually.

Recently, I was travelling from Australia to Europe and my watch stop to show correct time. I could set it manually but I am wondering there has to be some other way how to do it. It shows 77 less minutes than it really is. After sync there is no difference.