What UTC offset does London use?

London uses Greenwich Mean Time (GMT, UTC+0) from late October through late March, and British Summer Time (BST, UTC+1) from late March through late October. The UK switches clocks on the last Sunday in March and the last Sunday in October, different dates from the US transition.

What are typical business hours in London?

Standard business hours in London run 9 AM to 5:30 or 6 PM, Monday through Friday. The financial sector, particularly in the City of London and Canary Wharf, often starts earlier at 7 or 8 AM. Lunch is typically taken from 1 to 2 PM, and it is customary to actually leave the desk for lunch.

What is the time difference between London and New York?

London is normally 5 hours ahead of New York (EST). During summer when both observe DST, London (BST, UTC+1) is still 5 hours ahead of New York (EDT, UTC−4). However, in late March and late October there are brief windows when only one zone has transitioned, making the gap 4 or 6 hours.

Working Hours in London: A Timezone Guide

January 13, 2026

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Frequently Asked Questions

What UTC offset does London use?: London uses Greenwich Mean Time (GMT, UTC+0) from late October through late March, and British Summer Time (BST, UTC+1) from late March through late October. The UK switches clocks on the last Sunday in March and the last Sunday in October, different dates from the US transition.
What are typical business hours in London?: Standard business hours in London run 9 AM to 5:30 or 6 PM, Monday through Friday. The financial sector, particularly in the City of London and Canary Wharf, often starts earlier at 7 or 8 AM. Lunch is typically taken from 1 to 2 PM, and it is customary to actually leave the desk for lunch.
What is the time difference between London and New York?: London is normally 5 hours ahead of New York (EST). During summer when both observe DST, London (BST, UTC+1) is still 5 hours ahead of New York (EDT, UTC−4). However, in late March and late October there are brief windows when only one zone has transitioned, making the gap 4 or 6 hours.