Time-zone abbreviation
GMT — Greenwich Mean Time (UTC+0)
GMT stands for Greenwich Mean Time, the mean solar time at the Royal Observatory in Greenwich, London (UTC+0). The United Kingdom shifts to British Summer Time (BST, UTC+1) in summer; Ireland switches to Irish Standard Time (IST, UTC+1); Iceland and Ghana stay on GMT year-round.
Last updated · Maintained by Clockjumper
Current time in Greenwich Mean Time
4:32 AM
Friday, Jul 3
Europe/London
Quick facts
- Standard offset
- UTC+0 (GMT)
- Daylight saving
- Yes — shifts to BST (UTC+1)
- Next clock change
- Where it's used
- Used in the United Kingdom, Ireland, Iceland, and several West African countries including Ghana. Iceland and Ghana do not observe daylight saving.
Convert GMT to your time zone
Need to convert a specific time? Use the Clockjumper converter, or jump to one of these popular GMT conversions:
Frequently asked questions
- What does GMT stand for?
- GMT stands for Greenwich Mean Time.
- What is the UTC offset of GMT?
- Greenwich Mean Time is UTC+0, shifting to UTC+1 (BST) when daylight saving is in effect.
- Does GMT observe daylight saving time?
- Yes — Greenwich Mean Time shifts to BST (UTC+1) during summer. The next clock change is on October 25, 2026.