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BST: British Summer Time

BST is UTC+1: 1 hour ahead of Coordinated Universal Time. The United Kingdom from the last Sunday of March to the last Sunday of October. Clocks change at 01:00 UTC.

Current time at UTC+1
BST3:08 PMThu, Oct 22
UTC2:08 PMThu, Oct 22

Calculated from your device clock. Shown at the fixed BST offset, whether or not a particular place is using it today.

Is BST in use right now?

London switches between BST and GMT during the year.

Next change in London: Sunday, October 25, 2026, to UTC+0 (GMT). Based on time zone rules at build time.

Full name
British Summer Time
UTC offset
UTC+1ISO 8601: +01:00
Type
Daylight (summer) time
Winter counterpart
GMT · UTC+0
Example IANA zone
Europe/London
Ambiguous?
YesSee the note below
The letters BST mean more than one thing. Bangladesh Standard Time (UTC+6) uses the same letters. Use Dhaka or Asia/Dhaka to avoid that mix-up.

Where and when BST is used in 2026

Calculated for the cities in our directory from the IANA time zone database. Dates are local; each change happens in the early morning of the date shown.

CityIANA zoneOn BST (UTC+1)
LondonEurope/LondonMar 29 – Oct 25

BST conversion table

Every hour of the day in BST, converted at fixed offsets. To convert local time in a specific city, use the city instead: its offset may change with the date.

BST (UTC+1)UTC (UTC+0)EDT (UTC−4)PDT (UTC−7)CEST (UTC+2)IST (UTC+5:30)JST (UTC+9)
12:00 AM11:00 PMprevious day7:00 PMprevious day4:00 PMprevious day1:00 AM4:30 AM8:00 AM
1:00 AM12:00 AM8:00 PMprevious day5:00 PMprevious day2:00 AM5:30 AM9:00 AM
2:00 AM1:00 AM9:00 PMprevious day6:00 PMprevious day3:00 AM6:30 AM10:00 AM
3:00 AM2:00 AM10:00 PMprevious day7:00 PMprevious day4:00 AM7:30 AM11:00 AM
4:00 AM3:00 AM11:00 PMprevious day8:00 PMprevious day5:00 AM8:30 AM12:00 PM
5:00 AM4:00 AM12:00 AM9:00 PMprevious day6:00 AM9:30 AM1:00 PM
6:00 AM5:00 AM1:00 AM10:00 PMprevious day7:00 AM10:30 AM2:00 PM
7:00 AM6:00 AM2:00 AM11:00 PMprevious day8:00 AM11:30 AM3:00 PM
8:00 AM7:00 AM3:00 AM12:00 AM9:00 AM12:30 PM4:00 PM
9:00 AM8:00 AM4:00 AM1:00 AM10:00 AM1:30 PM5:00 PM
10:00 AM9:00 AM5:00 AM2:00 AM11:00 AM2:30 PM6:00 PM
11:00 AM10:00 AM6:00 AM3:00 AM12:00 PM3:30 PM7:00 PM
12:00 PM11:00 AM7:00 AM4:00 AM1:00 PM4:30 PM8:00 PM
1:00 PM12:00 PM8:00 AM5:00 AM2:00 PM5:30 PM9:00 PM
2:00 PM1:00 PM9:00 AM6:00 AM3:00 PM6:30 PM10:00 PM
3:00 PM2:00 PM10:00 AM7:00 AM4:00 PM7:30 PM11:00 PM
4:00 PM3:00 PM11:00 AM8:00 AM5:00 PM8:30 PM12:00 AMnext day
5:00 PM4:00 PM12:00 PM9:00 AM6:00 PM9:30 PM1:00 AMnext day
6:00 PM5:00 PM1:00 PM10:00 AM7:00 PM10:30 PM2:00 AMnext day
7:00 PM6:00 PM2:00 PM11:00 AM8:00 PM11:30 PM3:00 AMnext day
8:00 PM7:00 PM3:00 PM12:00 PM9:00 PM12:30 AMnext day4:00 AMnext day
9:00 PM8:00 PM4:00 PM1:00 PM10:00 PM1:30 AMnext day5:00 AMnext day
10:00 PM9:00 PM5:00 PM2:00 PM11:00 PM2:30 AMnext day6:00 AMnext day
11:00 PM10:00 PM6:00 PM3:00 PM12:00 AMnext day3:30 AMnext day7:00 AMnext day

Highlighted rows: 9 am – 5 pm in BST.

What to know about BST

BST is UTC+1. Writing “3 pm GMT” in July is a common error: London is then on BST, so the intended time is probably 3 pm BST, which is 14:00 UTC.

Because the UK and the US change clocks on different weekends, the usual five-hour London–New York difference becomes four hours for a few weeks each spring and autumn.

Read more about why abbreviations need context and how daylight saving changes offsets.

Popular conversions

Local time in cities that use BST

Other time zone abbreviations

All time zones →
UTCCoordinated Universal TimeUTC+0GMTGreenwich Mean TimeUTC+0CETCentral European TimeUTC+1CESTCentral European Summer TimeUTC+2ESTEastern Standard TimeUTC−5EDTEastern Daylight TimeUTC−4CSTCentral Standard Time (North America)UTC−6CDTCentral Daylight TimeUTC−5MSTMountain Standard TimeUTC−7PSTPacific Standard TimeUTC−8PDTPacific Daylight TimeUTC−7ISTIndia Standard TimeUTC+5:30JSTJapan Standard TimeUTC+9SGTSingapore TimeUTC+8GSTGulf Standard TimeUTC+4AESTAustralian Eastern Standard TimeUTC+10AEDTAustralian Eastern Daylight TimeUTC+11