GMT to BST converter
BST is 1 hours ahead of GMT right now. Live clocks on both sides, a direct time input, the full 24-hour table with a permalink per hour, and the real daylight-saving state — computed from the IANA tz database on every request, never from a stored offset.
Convert an exact time type it — no sliders
Conversion runs in your browser against the same IANA rules the server uses, so it keeps working offline and nothing you type is sent anywhere.
Daylight saving right now
British Summer Time
Europe/London is currently on BST (UTC+01:00), its daylight-saving clock.
next change: Sun, 25 Oct 2026 01:00 local → GMT (73 days, clocks go back)
BST is the UK's summer clock, UTC+1, from the last Sunday in March to the last Sunday in October. The rest of the year the UK is on GMT, which equals UTC. BST is also Bangladesh Standard Time (UTC+6).
Greenwich Mean Time
Etc/GMT is on GMT (UTC+00:00).
no clock change scheduled — fixed at UTC+00:00
GMT is UTC+0 and never shifts. The UK observes GMT in winter only — in summer it is on BST (UTC+1), so "GMT" on a British invite dated in July usually means BST.
Best time to call green = 09:00–18:00 on both sides
8 overlapping working hours. The longest run is 09:00–17:00 GMT, which is 10:00–18:00 BST.
GMT to BST, hour by hour 13 August 2026 · every row is a permalink
| GMT | BST | 12-hour | Day | Permalink |
|---|---|---|---|---|
| 00:00 | 01:00 BST | 1:00 AM | same day | 00:00 → |
| 01:00 | 02:00 BST | 2:00 AM | same day | 01:00 → |
| 02:00 | 03:00 BST | 3:00 AM | same day | 02:00 → |
| 03:00 | 04:00 BST | 4:00 AM | same day | 03:00 → |
| 04:00 | 05:00 BST | 5:00 AM | same day | 04:00 → |
| 05:00 | 06:00 BST | 6:00 AM | same day | 05:00 → |
| 06:00 | 07:00 BST | 7:00 AM | same day | 06:00 → |
| 07:00 | 08:00 BST | 8:00 AM | same day | 07:00 → |
| 08:00 | 09:00 BST | 9:00 AM | same day | 08:00 → |
| 09:00 | 10:00 BST | 10:00 AM | same day | 09:00 → |
| 10:00 | 11:00 BST | 11:00 AM | same day | 10:00 → |
| 11:00 | 12:00 BST | 12:00 PM | same day | 11:00 → |
| 12:00 | 13:00 BST | 1:00 PM | same day | 12:00 → |
| 13:00 | 14:00 BST | 2:00 PM | same day | 13:00 → |
| 14:00 | 15:00 BST | 3:00 PM | same day | 14:00 → |
| 15:00 | 16:00 BST | 4:00 PM | same day | 15:00 → |
| 16:00 | 17:00 BST | 5:00 PM | same day | 16:00 → |
| 17:00 | 18:00 BST | 6:00 PM | same day | 17:00 → |
| 18:00 | 19:00 BST | 7:00 PM | same day | 18:00 → |
| 19:00 | 20:00 BST | 8:00 PM | same day | 19:00 → |
| 20:00 | 21:00 BST | 9:00 PM | same day | 20:00 → |
| 21:00 | 22:00 BST | 10:00 PM | same day | 21:00 → |
| 22:00 | 23:00 BST | 11:00 PM | same day | 22:00 → |
| 23:00 | 00:00 BST | 12:00 AM | next day | 23:00 → |