What is the time difference between London and Dublin?

London and Dublin are on the same time all year. Both observe GMT (UTC+0) in winter. In summer, London switches to BST (UTC+1) and Dublin to IST (UTC+1). Because both shift clocks on the same Sunday, the offset stays at 0 hours throughout the year.

Do London and Dublin change clocks at the same time?

Yes. Both the UK and Ireland move clocks forward on the last Sunday in March and back on the last Sunday in October. There is no period where they differ.

What does IST stand for for Dublin?

IST stands for Irish Standard Time (UTC+1), used in Ireland during summer. It is equivalent to BST (British Summer Time) in the UK. Both are UTC+1 and start/end on the same day.

When does Dublin change its clocks?

Ireland moves clocks forward on the last Sunday in March at 01:00 GMT (becoming IST, UTC+1) and back on the last Sunday in October at 02:00 IST (returning to GMT, UTC+0). This is the same calendar date as the UK change.

What are good meeting times for both London and Dublin?

Since London and Dublin are always on the same time, any business hour works equally well for both cities. The full 09:00–18:00 window is mutually convenient for both London and Dublin.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

Time Difference: London to Dublin

See the current time in London and Dublin side by side, with the exact hour offset, updated live every second.

London, United Kingdom

--:--:--

GMT UTC+0

Dublin, Ireland

--:--:--

GMT UTC+0

Current Offset

0 hours

London and Dublin are on the same time

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

London	Dublin	Status

Convert London Time to Dublin Time

Based on the current offset — updates automatically

London	Dublin

Summary

This tool displays the live current time in both London (Europe/London — GMT in winter, BST in summer) and Dublin (Europe/Dublin — GMT in winter, IST in summer) side by side. London and Dublin observe the same UTC offset year-round because both the UK and Ireland switch their clocks on the same day each spring and autumn. The exact offset is calculated automatically from your browser's IANA timezone database and refreshes every second.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
The same moment is converted to Europe/Dublin time.
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — London time, Dublin time, and the offset — refresh every second.
DST transitions for both cities are handled automatically; they switch on the same day, so the offset is 0 hours year-round.

Use cases

Scheduling video calls between London and Dublin offices.
Checking if a colleague in Dublin is still at their desk.
Planning travel between the UK and Ireland.
Remote teams coordinating daily standups across the Irish Sea.
Finding overlapping business hours for London-Dublin meetings.
Verifying the current timezone abbreviation for each city.
Journalists checking broadcast times for live UK and Irish events.
Students and teachers arranging online lessons between London and Dublin.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu