BST is used for 2 different time zones. The table below shows each one with its offset and current time.
What BST can mean
The letters BST are shared by zones on different offsets. A meeting invite that says only BST can be read several ways, so add a city name or a UTC offset.
| Name | UTC offset | Time now | Used in |
|---|---|---|---|
| British Summer Time | UTC+1 | --:-- | Europe/London |
| Bangladesh Standard Time | UTC+6 | --:-- | Asia/Dhaka |
Who uses BST
| IANA time zone | Uses BST | Main cities |
|---|---|---|
| Europe/London | During daylight saving time | London, Birmingham, Glasgow |
| Asia/Dhaka | All year | Dhaka, Chittagong, Gazipur |
BST and GMT
BST is the summer version of GMT, 1 hour ahead of it. People often write GMT all year, which is wrong for the daylight saving months; a city name avoids the problem.
Tools for time in BST
- Convert a time to or from BST: pick a date and time and see it in every city on your list.
- Add London to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in BST and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
Is it BST or GMT right now?
GMT is in use now in London. BST returns on Sunday, March 28, 2027.
Which time zone does BST mean?
It depends on who wrote it. British Summer Time (UTC+1): London; Bangladesh Standard Time (UTC+6): Dhaka. Ask for a city or a UTC offset if the context does not make it clear.
What time is 12:00 BST in UTC?
12:00 BST is 11:00 AM UTC.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.