Daylight saving time guide
GMT vs BST: what London time means
London uses GMT in winter and BST during British Summer Time. The offset changes by one hour.
Quick answer
Live IANA timezone check
This page uses Europe/London, not a fixed abbreviation, so the browser's IANA timezone database can show the current short name and UTC offset.
UK daylight saving
London time is often searched as GMT, but in summer London normally observes BST. That means a New York to London meeting gap can shift around March.
For precise scheduling, use the IANA timezone such as Europe/London and a real calendar date. Abbreviations are helpful labels, but they can be ambiguous and change with daylight saving time.
FAQ
Is London always GMT?
No. London normally uses BST during the summer daylight-saving season.
Is BST the same as UTC+1?
For UK civil time during summer, BST is UTC plus 1 hour.
Should I schedule in GMT or Europe/London?
Use Europe/London when you need the correct offset on a specific date.