Greenwich Mean Time (GMT)
GMT is UTC+0. Current time and where it is used.
GMT time now
--:--:--
Saturday, September 19, 2026
UTCUTC+0
UK time is on BST right now, not GMT
UK time now: --:--:-- (BST)
GMT in your time zone
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About GMT
- Full Name
- Greenwich Mean Time
- Abbreviation
- GMT
- UTC Offset
- UTC+0
- Currently
- No DST
- Daylight Saving Time
- UK time: Ends Oct 25, 2026
Greenwich Mean Time (GMT) is the time at UTC+0. GMT and UTC show the same clock time; UTC is the scientific standard, while GMT is a time zone name. The United Kingdom and Ireland use GMT only in winter: in summer the UK switches to British Summer Time (BST, UTC+1) and Ireland to Irish Standard Time (IST, UTC+1).
Where GMT is used
Changes seasonally
- United Kingdom — GMT in winter, British Summer Time (UTC+1) in summer
- Ireland — GMT in winter, Irish Standard Time (UTC+1) in summer
UTC+0 all year
- Iceland
- Ghana, Senegal, Côte d’Ivoire and several other West African countries
Major Cities in Greenwich Mean Time and GMT
London--:--BSTBirmingham--:--BSTBelfast--:--BSTBirkenhead--:--BSTBradford--:--BSTBrighton--:--BSTBristol--:--BSTAbidjan--:--GMTAccra--:--GMTDakar--:--GMTKumasi--:--GMTEach city shows its own current abbreviation, so places on daylight saving time are labelled accordingly.
GMT vs Other Time Zones
| Comparison | By definition | Right now (local clocks) |
|---|---|---|
| GMT to UTC | Same time | Same region |
| GMT to IST | +5 hours 30 minutes | +5 hours 30 minutes |
| GMT to EST | -5 hours | -4 hours |
| GMT to CST | -6 hours | -5 hours |
| GMT to PST | -8 hours | -7 hours |
“By definition” compares the fixed offsets of the abbreviations. “Right now” compares the actual local time in each region today, including daylight saving time.
GMT converters
- IST to GMTIndia Standard Time → Greenwich Mean Time
- GMT to ISTGreenwich Mean Time → India Standard Time
- EST to GMTEastern Standard Time → Greenwich Mean Time
- GMT to ESTGreenwich Mean Time → Eastern Standard Time
- PST to GMTPacific Standard Time → Greenwich Mean Time
- GMT to PSTGreenwich Mean Time → Pacific Standard Time
- GMT to CETGreenwich Mean Time → Central European Time
- CET to GMTCentral European Time → Greenwich Mean Time
- CST to GMTCentral Standard Time → Greenwich Mean Time
- GMT to CSTGreenwich Mean Time → Central Standard Time
- GMT to AESTGreenwich Mean Time → Australian Eastern Standard Time
- AEST to GMTAustralian Eastern Standard Time → Greenwich Mean Time
- GMT to JSTGreenwich Mean Time → Japan Standard Time
- JST to GMTJapan Standard Time → Greenwich Mean Time
- GMT to SGTGreenwich Mean Time → Singapore Standard Time
- SGT to GMTSingapore Standard Time → Greenwich Mean Time
- GMT to GSTGreenwich Mean Time → Gulf Standard Time
- GST to GMTGulf Standard Time → Greenwich Mean Time
- GMT to EETGreenwich Mean Time → Eastern European Time
- EET to GMTEastern European Time → Greenwich Mean Time
- GMT to HKTGreenwich Mean Time → Hong Kong Time
- HKT to GMTHong Kong Time → Greenwich Mean Time
Current time at every GMT offset
GMT-5, GMT+1 and so on are the same offsets as UTC-5 and UTC+1. Each links to the page for that offset.
| Offset | Time now | Used by |
|---|---|---|
| GMT-10 | --:-- | Honolulu |
| GMT-9 | --:-- | Anchorage |
| GMT-8 | --:-- | Anchorage, Los Angeles, Tijuana |
| GMT-7 | --:-- | Boise, Ciudad Juárez, Denver |
| GMT-6 | --:-- | San José, Guatemala City, Mérida |
| GMT-5 | --:-- | Chicago, Winnipeg, Bogotá |
| GMT-4 | --:-- | Manaus, Port of Spain, San Juan |
| GMT-3:30 | --:-- | St. John's |
| GMT-3 | --:-- | Buenos Aires, Córdoba, Halifax |
| GMT-2:30 | --:-- | St. John's |
| GMT-2 | --:-- | Fernando de Noronha Standard Time |
| GMT-1 | --:-- | Azores Time |
| GMT+1 | --:-- | Amsterdam, Berlin, Brussels |
| GMT+2 | --:-- | Amsterdam, Berlin, Brussels |
| GMT+3 | --:-- | Baghdad, Manama, Kuwait City |
| GMT+3:30 | --:-- | Tehran |
| GMT+4 | --:-- | Yerevan, Baku, Tbilisi |
| GMT+5 | --:-- | Astana, Karachi, Tashkent |
| GMT+5:30 | --:-- | Ahmedabad, Colombo |
| GMT+5:45 | --:-- | Kathmandu |
| GMT+6 | --:-- | Dhaka |
| GMT+7 | --:-- | Bangkok, Hanoi, Novosibirsk |
| GMT+8 | --:-- | Perth, Beijing, Hong Kong |
| GMT+8:45 | --:-- | Australian Central Western Standard Time |
| GMT+9 | --:-- | Tokyo, Seoul |
| GMT+9:30 | --:-- | Darwin, Adelaide |
| GMT+10 | --:-- | Brisbane, Hobart, Melbourne |
| GMT+10:30 | --:-- | Adelaide |
| GMT+11 | --:-- | Hobart, Melbourne, Sydney |
| GMT+12 | --:-- | Suva, Auckland |
| GMT+12:45 | --:-- | Chatham Time |
| GMT+13 | --:-- | Auckland |
| GMT+13:45 | --:-- | Chatham Time |
GMT FAQs
What is GMT?
Greenwich Mean Time (GMT) is the time at UTC+0. GMT and UTC show the same clock time; UTC is the scientific standard, while GMT is a time zone name. The United Kingdom and Ireland use GMT only in winter: in summer the UK switches to British Summer Time (BST, UTC+1) and Ireland to Irish Standard Time (IST, UTC+1).
What is the UTC offset of GMT?
GMT is always UTC+0 and never changes for daylight saving time.
Is UK time on GMT right now?
UK time is on BST right now, not GMT. BST is UTC+1, 1 hour ahead of GMT. GMT itself is always UTC+0. UK time returns to GMT on Sunday, October 25, 2026 at 2:00 AM.
When does UK time change its clocks?
In 2026, UK time switches to BST on Sunday, March 29, 2026 at 1:00 AM (clocks go forward 1 hour) and back on Sunday, October 25, 2026 at 2:00 AM (clocks go back 1 hour).
Is GMT the same as UTC?
For everyday purposes, yes: GMT and UTC show the same time (UTC+0). UTC is the precise atomic time standard used to define every time zone, while GMT is the name of the time zone. Neither changes for daylight saving time.