Greenwich Mean Time (GMT) · UTC+0 in winter · BST (UTC+1) during British Summer Time
| City | Zone | Current Time |
|---|---|---|
| UK (GMT/BST) | UTC+0 | --:-- |
| New York | EST/EDT | --:-- |
| Chicago | CST/CDT | --:-- |
| Los Angeles | PST/PDT | --:-- |
| Toronto | EST/EDT | --:-- |
| Paris / Berlin | CET/CEST | --:-- |
| Dubai | GST | --:-- |
| Mumbai (IST) | IST | --:-- |
| Singapore | SGT | --:-- |
| Sydney | AEST/AEDT | --:-- |
UK business hours: 9:00 AM – 6:00 PM GMT (winter) / BST (summer). The table below uses GMT (UTC+0) as the reference.
| Calling From | Your Time | UK Time |
|---|---|---|
| EST (New York) | 4:00 AM – 1:00 PM EST | 9:00 AM – 6:00 PM GMT |
| PST (Los Angeles) | 1:00 AM – 10:00 AM PST | 9:00 AM – 6:00 PM GMT |
| CET (Berlin/Paris) | 10:00 AM – 7:00 PM CET | 9:00 AM – 6:00 PM GMT |
| IST (India) | 2:30 PM – 11:30 PM IST | 9:00 AM – 6:00 PM GMT |
| SGT (Singapore) | 5:00 PM – 2:00 AM SGT | 9:00 AM – 6:00 PM GMT |
| JST (Tokyo) | 6:00 PM – 3:00 AM JST | 9:00 AM – 6:00 PM GMT |
The United Kingdom uses Greenwich Mean Time (GMT, UTC+0) from late October to late March, and British Summer Time (BST, UTC+1) for the rest of the year. The switch happens on the last Sunday in March (clocks go forward 1 hour) and the last Sunday in October (clocks go back).
GMT vs UTC: Greenwich Mean Time and Coordinated Universal Time (UTC) share the same numeric offset (UTC+0) but are different standards. UTC is the international atomic clock standard; GMT is a time zone designation used by the UK and several other countries. In everyday usage, GMT and UTC+0 are interchangeable.
All four nations of the UK — England, Scotland, Wales, and Northern Ireland — observe the same time zone. There are no internal time zone splits. The Republic of Ireland (a separate country) also uses the same Europe/Dublin zone, which follows GMT/IST (Irish Standard Time) on the same schedule as GMT/BST.
| Period | Abbreviation | UTC Offset | Dates (approx.) |
|---|---|---|---|
| Standard Time | GMT | UTC+0 | Last Sun Oct → Last Sun Mar |
| British Summer Time | BST | UTC+1 | Last Sun Mar → Last Sun Oct |
| City / Region | Time Zone | Local Time (when GMT = 12:00) |
|---|---|---|
| New York | EST (UTC−5) | 7:00 AM(8:00 AM EDT in summer) |
| Los Angeles | PST (UTC−8) | 4:00 AM(5:00 AM PDT in summer) |
| Toronto | EST (UTC−5) | 7:00 AM(8:00 AM EDT in summer) |
| Lagos (Nigeria) | WAT (UTC+1) | 1:00 PM |
| Berlin / Paris | CET (UTC+1) | 1:00 PM(2:00 PM CEST in summer) |
| Dubai | GST (UTC+4) | 4:00 PM |
| Mumbai (IST) | IST (UTC+5:30) | 5:30 PM |
| Singapore | SGT (UTC+8) | 8:00 PM |
| Tokyo | JST (UTC+9) | 9:00 PM |
| Sydney | AEST (UTC+10) | 10:00 PM(11:00 PM AEDT in summer) |