About Greenwich Mean Time
Greenwich Mean Time is used in the UK and Ireland in winter, and all year in Iceland and several West African countries such as Ghana and Senegal. GMT is the clock at the Royal Observatory in Greenwich, London, and is the same as UTC. In summer the UK switches to British Summer Time (BST, UTC+1).
Daylight saving time
Greenwich Mean Time is UTC+0 all year. It does not change for daylight saving time, so its gap to places that do switch, like New York or London, changes by an hour twice a year.
Cities on this clock
GMT vs. other time zones
| Time zone | Now | vs. GMT | Converter |
|---|---|---|---|
| Eastern Time EST/EDT | — | — | GMT to EST |
| Central Time CST/CDT | — | — | GMT to CST |
| Mountain Time MST/MDT | — | — | GMT to MST |
| Pacific Time PST/PDT | — | — | GMT to PST |
| Alaska Time AKST/AKDT | — | — | GMT to AKST |
| Hawaii Time HST | — | — | GMT to HST |
| Coordinated Universal Time UTC | — | — | GMT to UTC |
| Central European Time CET/CEST | — | — | GMT to CET |
| Eastern European Time EET/EEST | — | — | GMT to EET |
| India Standard Time IST | — | — | GMT to IST |
| Japan Standard Time JST | — | — | GMT to JST |
| Australian Eastern Time AEST/AEDT | — | — | GMT to AEST |
| Singapore Time SGT | — | — | GMT to SGT |
| Philippine Time PHT | — | — | GMT to PHT |
| Moscow Time MSK | — | — | GMT to MSK |
| Gulf Standard Time GST | — | — | GMT to GST |
Times update live. Plan a meeting across time zones.
Questions
Does Greenwich Mean Time change for daylight saving time?
No. Greenwich Mean Time (GMT) stays at UTC+0 all year.
Where is Greenwich Mean Time used?
Greenwich Mean Time is used in the UK and Ireland in winter, and all year in Iceland and several West African countries such as Ghana and Senegal. GMT is the clock at the Royal Observatory in Greenwich, London, and is the same as UTC. In summer the UK switches to British Summer Time (BST, UTC+1).
What is GMT in UTC?
GMT is UTC+0.