BST — British Summer Time

UTC+1 · Active from last Sunday of March to last Sunday of October

GMT/BST — Greenwich Mean Time
--:--:--
GMT UTC+0BST UTC+1 (DST)

Time Zone Facts

Standard Offset
UTC+0
DST Offset
UTC+1
Standard Abbr
GMT
DST Abbr
BST
IANA Identifier
Europe/London
DST Schedule
Last Sunday of March → Last Sunday of October

States in GMT/BST — Greenwich Mean Time

EnglandScotlandWalesNorthern IrelandJerseyGuernseyIsle of ManIreland (IST, same offset)

Major Cities in GMT/BST

LondonManchesterBirminghamEdinburghGlasgowDublinBelfastCardiff

Daylight Saving Time

BST active: Last Sunday of March → Last Sunday of October

Clocks spring forward 1 hour at 2:00 AM on the second Sunday in March, changing from GMT (UTC+0) to BST (UTC+1).

Clocks fall back 1 hour at 2:00 AM on the first Sunday in November, returning from BST (UTC+1) to GMT (UTC+0).

Frequently Asked Questions

What is BST?
BST stands for British Summer Time. It is UTC+1, used in the United Kingdom and Crown Dependencies (Jersey, Guernsey, Isle of Man) from the last Sunday of March to the last Sunday of October. Outside this period, the UK uses GMT (UTC+0). Ireland observes Irish Standard Time (IST) simultaneously, which is also UTC+1.
What UTC offset is BST?
BST is UTC+1, meaning it is 1 hour ahead of Coordinated Universal Time. It is the UK's Daylight Saving Time (summer) offset. The UK uses GMT (UTC+0) in winter and BST (UTC+1) in summer.
When does the UK switch to BST in 2026?
In 2026, the UK switches to BST on Sunday, March 29, 2026 at 1:00 AM GMT (clocks move to 2:00 AM BST). Clocks go back to GMT on Sunday, October 25, 2026 at 2:00 AM BST (clocks move to 1:00 AM GMT).
What is the difference between BST and EST?
BST (UTC+1) is 6 hours ahead of EST (UTC-5). When New York is on EDT (UTC-4) in summer, BST is only 5 hours ahead. The exact difference depends on whether both the UK and US have changed their clocks, as transitions happen on different dates.
What is the difference between BST and CEST?
BST (UTC+1) is 1 hour behind CEST (UTC+2). When Central Europe observes CEST (summer time), the UK on BST is 1 hour behind. For example, 14:00 CEST = 13:00 BST.
What countries observe BST?
BST is observed in: England, Scotland, Wales, Northern Ireland, Jersey, Guernsey, and the Isle of Man. Ireland observes Irish Standard Time (IST) at the same offset (UTC+1) but under a different name.

BST Converters & UK Time

GMT to ESTGMT to PSTGMT to CSTEST to GMTPST to GMTCEST TimezoneDaylight Saving — UKTime in LondonTime Converter
BST (British Summer Time) = UTC+1. Active during UK DST: last Sunday of March to last Sunday of October. Data sourced from IANA Time Zone Database (Europe/London).