World Clock

Greenwich Mean Time (GMT) has no offset from Coordinated Universal Time (UTC). This time zone is in use during standard time in: Europe, Africa, North America, Antarctica. This time zone is often called Greenwich Mean Time. See full time zone map Summer Time & DST Some places observe daylight saving time/summer time during the summer, and therefore use IST (Irish Standard Time) or BST (British Summer Time) in the summer. Email Time Zone Indicator: +0000 An email sent from someone in the Greenwich Mean Time (GMT) time zone will have the time zone listed as "+0000" in the headers of the email. (However, "+0000" does not have to be in Greenwich Mean Time, as other time zones could have the same UTC offset).