NB: The Azores operate Azores Time.
Coimbra Portugal Time (Mainland and Madeira) 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 Coimbra Portugal Time , where the time is shifted forward by 1 hour; 1 hours 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).