Europe · Northern Europe · Sovereign state
Current time in Ireland
A single time zone at UTC+01:00. Currently observing daylight saving time.
Sunday, May 31, 2026
About Ireland's time
A single time zone.
Ireland uses a single time zone — Irish Standard Time (IST, UTC+01:00) in summer and Greenwich Mean Time (GMT, UTC+00:00) in winter. It's one of the few countries whose standard time matches the UK's during winter but shifts forward in summer, so Dublin and London always stay in sync.
Next clock change
2026 Sunday · clocks fall back
Clocks fall back by one hour · in 5 months.
Daylight saving schedule
Major cities
Cities of Ireland.
History
How Ireland keeps time.
Ireland shared the same timekeeping as Britain for centuries, observing GMT (UTC+00:00) during the colonial and post-independence periods. When the UK introduced British Summer Time during both World Wars, Ireland followed suit to maintain alignment.
After WWII, Ireland briefly experimented with a different rhythm — from 1968 to 1971 the country kept clocks forward year-round during the "Standard Time Act" experiment meant to reduce road accidents and align better with solar time. The experiment was unpopular, and Ireland reverted to seasonal clock changes.
A key policy moment came in 1971 when the Standard Time Act formally defined Irish Standard Time as UTC+01:00 (GMT+01) in summer. Today Ireland follows the EU's harmonised daylight saving schedule, meaning clocks jump forward on the last Sunday of March and back on the last Sunday of October — just like the UK.
When the UK left the EU, there were concerns Northern Ireland and the Republic of Ireland might fall out of sync, potentially creating a "time border." For now, both sides continue to change clocks together by convention, and the Irish government has repeatedly said it will maintain summer time regardless of what the UK does.
Did you know?
Things about Ireland's time.
Ireland's timezone often surprises visitors: the Republic of Ireland uses IST (Irish Standard Time) in summer, which reads the same as "India Standard Time" — but it's a completely different meaning. IST here simply means UTC+00:00 in winter shifts to UTC+01:00 in summer.
Ireland sits around the 53rd parallel north, and its longitude (about 6°W) puts it naturally in the GMT zone. Interestingly, on the summer solstice the sun doesn't set until nearly 10pm in Dublin, giving very long evenings — a beloved feature of Irish summers.
Because Ireland historically aligned its clock with the UK, GMT is effectively the country's "natural" solar time (mean solar time at Dublin is roughly UTC-0:25, close to GMT). The shift to summer time means Irish evenings are bright well into late evening in summer, but winter mornings can stay dark until nearly 9am.
Frequently asked questions
Common questions about Ireland's time zone, daylight saving rules, and how to handle it in software. Can't find what you need? Email [email protected].
- What timezone is Ireland in?
- Ireland uses Greenwich Mean Time (GMT, UTC+00:00) in winter and Irish Standard Time (IST, UTC+01:00) in summer. It follows the EU daylight saving schedule, moving clocks forward one hour on the last Sunday of March and back on the last Sunday of October.
- Is Ireland on GMT all year round?
- No. Ireland observes daylight saving time. It's on GMT (UTC+00:00) from late October to late March, and switches to Irish Standard Time (UTC+01:00) for the summer months. So it shares the same time as the UK year-round.
- Why is the abbreviation IST confusing for Ireland?
- IST stands for Irish Standard Time in Ireland, but IST is also the abbreviation for India Standard Time (UTC+0:30). They are different time zones entirely. Context determines the meaning: in Ireland, IST means UTC+01:00 during summer daylight saving time, while India Standard Time is UTC+05:30 and does not change for daylight saving.
- Is Ireland on the same time as the UK?
- Yes, Ireland and the UK share the exact same local time all year. Both use GMT in winter and their respective summer time shifts in summer (BST in the UK, IST in Ireland), effectively keeping clocks in sync.
- Does Northern Ireland have a different timezone from the Republic?
- No. Both Northern Ireland (UK) and the Republic of Ireland share the same local time all year round, using GMT in winter and summer time shifts in summer. There is no "time border" between them.
- Does Ireland observe daylight saving time?
- Yes. Like the EU, Ireland moves clocks forward one hour in spring (late March), switching from GMT to Irish Standard Time, and back in autumn (late October). Summer sunsets can be as late as 10pm in Dublin.
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