GMT: Greenwich Mean Time
The time standard at the Prime Meridian, and the baseline every other zone is measured from. The United Kingdom keeps GMT in winter and switches to British Summer Time from late March to late October.
Daylight
Current GMT time
00:00:00
Shown for Cardiff, a representative location on GMT.
Sunrise
-
Local time
Sunset
-
Local time
UTC now
-
Coordinated Universal Time
Your zone
-
UTC
Same as you
-
Relative to your device
- Abbreviation
- GMT
- Standard offset
- UTC
- Daylight saving
- Observed
- vs UK now
- Same
Greenwich Mean Time
Changes with BST
Where GMT is used
- United Kingdom
- Ireland
- Portugal
- Iceland
- Ghana
- Senegal
Cities on GMT
GMT converted to major cities
The current moment, read off each city's own clock.
| City | Local time | Date | vs Cardiff |
|---|---|---|---|
| LondonUnited Kingdom | --:-- | ||
| New YorkUnited States | --:-- | ||
| Los AngelesUnited States | --:-- | ||
| ChicagoUnited States | --:-- | ||
| São PauloBrazil | --:-- | ||
| ParisFrance | --:-- | ||
| DubaiUAE | --:-- | ||
| MumbaiIndia | --:-- | ||
| SingaporeSingapore | --:-- | ||
| TokyoJapan | --:-- | ||
| SydneyAustralia | --:-- |
GMT and the UK
GMT currently matches UK clocks exactly. Both GMT locations and the UK adjust their clocks seasonally, but rarely on the same dates, expect the gap to move by an hour for a few weeks each spring and autumn.
GMT: questions
- What is GMT?
- GMT stands for Greenwich Mean Time. It is UTC, meaning it matches Coordinated Universal Time. The time standard at the Prime Meridian, and the baseline every other zone is measured from. The United Kingdom keeps GMT in winter and switches to British Summer Time from late March to late October.
- Which countries use GMT?
- GMT is used across United Kingdom, Ireland, Portugal, Iceland, Ghana, Senegal.
- Does GMT change for daylight saving?
- Yes, locations on GMT adjust their clocks seasonally, so the offset shown here applies for part of the year only. The live clock above always reflects the current position.
- What is GMT in UK time?
- GMT currently matches UK time.