You need to upgrade your Flash PlayerThis is replaced by the Flash content. Daylight-Saving Time is not in effect. All of Ireland is in the Western European Time Zone. Western European Standard Time (WET) is Greenwich Mean Time (GMT). Like most states in Europe, Summer (Daylight-Saving) Time is observed in Ireland, where the time is shifted forward by 1 hour; 1 hour ahead of Greenwich Mean Time (GMT+1). After the Summer months the time is shifted back by 1 hour to Western European Time (WET) or (GMT). Belfast''s summer time zone is British Summer Time (BST) and Dublin is Irish Summer Time (IST).