What is the difference between BST and UTC?

UTC is 1 hour behind of BST. BST means British Summer Time at UTC+1, and UTC means Coordinated Universal Time at UTC+0.

Which time zone does this page use for BST?

Europe/London. An abbreviation is not a time zone — it is a label a zone wears for part of the year — so every calculation here uses a named IANA zone and says which one. If you are writing code, use Europe/London rather than the string "BST".

Does BST mean anything else?

Yes: Bangladesh Standard Time at UTC+6. Five hours ahead of British Summer Time, and unrelated to it.

Is BST a daylight saving abbreviation?

Yes. BST only exists during the daylight saving part of the year; outside it, the same zone is on a different abbreviation and a different offset.

BST to UTC | YourWorldTime

BST to UTC

UTC is 1 hour behind of BST: BST is UTC+1 and UTC is UTC+0.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Computed on a date when BST is genuinely in force — using today would be wrong for half the year, because a standard-time abbreviation does not exist in summer.

BST	UTC
00:00	23:00previous day
01:00	00:00
02:00	01:00
03:00	02:00
04:00	03:00
05:00	04:00
06:00	05:00
07:00	06:00
08:00	07:00
09:00	08:00
10:00	09:00
11:00	10:00
12:00	11:00
13:00	12:00
14:00	13:00
15:00	14:00
16:00	15:00
17:00	16:00
18:00	17:00
19:00	18:00
20:00	19:00
21:00	20:00
22:00	21:00
23:00	22:00

What these abbreviations actually are

	BST	UTC
Full name	British Summer Time	Coordinated Universal Time
Representative zone	Europe/London	UTC
Offset	UTC+1	UTC+0
Seasonal	Daylight saving only	Standard time
Zone changes in 2026	2	0
Other meanings	1	None in common use

Common questions

What is the difference between BST and UTC?: UTC is 1 hour behind of BST. BST means British Summer Time at UTC+1, and UTC means Coordinated Universal Time at UTC+0.
Which time zone does this page use for BST?: Europe/London. An abbreviation is not a time zone — it is a label a zone wears for part of the year — so every calculation here uses a named IANA zone and says which one. If you are writing code, use Europe/London rather than the string "BST".
Does BST mean anything else?: Yes: Bangladesh Standard Time at UTC+6. Five hours ahead of British Summer Time, and unrelated to it.
Is BST a daylight saving abbreviation?: Yes. BST only exists during the daylight saving part of the year; outside it, the same zone is on a different abbreviation and a different offset.