Dublin
UTC+1Ireland · IST
Sat, 8 Aug 2026
Timezone Guide
Dublin, Ireland runs on UTC+1. Clocks move forward each spring and back each autumn: UTC+0 in winter, UTC+1 in summer. Next change: 25 Oct. There is a 5-hour difference between Dublin and New York. Standard 9-to-6 working hours overlap for about 4 hours a day with New York. A good time to connect: 14:00–18:00 in Dublin lines up with 09:00–13:00 in New York. Dublin and London currently share the same clock. Standard 9-to-6 working hours overlap for about 9 hours a day with London. A good time to connect: 09:00–18:00 in Dublin lines up with 09:00–18:00 in London. There is a 8-hour difference between Dublin and Tokyo. Standard 9-to-6 working hours overlap for about 1 hours a day with Tokyo. A good time to connect: 09:00–10:00 in Dublin lines up with 17:00–18:00 in Tokyo. This timezone is also shared with cities such as Lisbon, Lagos, Casablanca. Keeping these offsets in mind makes it easier to schedule calls or travel to and from Dublin.
Practical Info
Dublin (Ireland) is home to roughly 1.2M people. Today brings about 18.0 hours of daylight: sunrise at 03:54, sunset at 21:54. Clocks move forward each spring and back each autumn: UTC+0 in winter, UTC+1 in summer. Next change: 25 Oct. It sits in the Northern Hemisphere, about 53° north of the equator. Traffic drives on the left.
Flag
Ireland
Capital
Dublin 👑
Continent
Europe
Time Zone
IST · Europe/Dublin
Coordinates
53.35°N, 6.26°W
Currency
EUR (€)
Calling Code
+353
Driving Side
Left
Hemisphere
Northern
Language
Irish, English
Measurement System
Metric
Did You Know?
Ireland Lost Twenty-Five Minutes and Never Got Them Back
The St James's Gate brewery has been operating on the same site in Dublin since 1759. It produces about 2.5 million pints of stout a day.
Divide that out and it comes to roughly 1,700 pints a minute — around twenty-nine every second, continuously, from one address. At its peak in the 1930s the brewery employed over 5,000 people and was the largest employer in the city; automation has brought that down to about 600. The site once had its own railway, and a gate stretched across St James's Street, which is where the name comes from.
Two hundred and sixty-seven years in one place, doing one thing.
The clock: Ireland's own time zone lasted thirty-six.
The Statutes (Definition of Time) Act 1880 established Greenwich Mean Time as the legal time for Great Britain and Dublin Mean Time for Ireland. Dublin Mean Time was the local mean time at Dunsink Observatory, just outside the city — 25 minutes and 21 seconds behind Greenwich. It was the legal time across all thirty-two counties.
Then, months after the Easter Rising, the House of Commons passed the Time (Ireland) Act 1916, abolishing it.
The mechanism was elegant and is worth stating precisely. The change took effect on the night of 30 September / 1 October 1916, the same night British clocks went back an hour at the end of summer time.
Irish clocks went back thirty-five minutes instead of sixty.
The twenty-five minutes were absorbed into the change and never returned. Farmers, local councils, politicians and business groups objected. Countess Markievicz, one of the leaders of the Rising, complained bitterly in writing. The Home Secretary told the Commons that assimilation had been pressed upon him from all quarters in Ireland.
Ireland became independent a few years later and never went back to Dublin Mean Time. It has followed Greenwich and the British daylight saving schedule for more than a century since.
One brewery on one site for 267 years. One national time zone for 36, ended in a single night, by 35 minutes instead of an hour.
Sources
- Dublin City Council, *Dublin Time* (1880 Time Act; Dunsink Gözlemevi boylamı; 25 dakika 21 saniye; 30 Eylül/1 Ekim 1916 gecesi saatlerin 35 dakika geri alınması)
- Wikipedia, *UTC−00:25:21* (Dublin Mean Time'ın 1880-1916 arası resmî saat olması)
- The Irish Times (36 yıllık süre; çiftçi, siyasetçi ve iş çevrelerinin muhalefeti; Kontes Markievicz'in mektubu)
- TheJournal.ie (İçişleri Bakanı Herbert Samuel'in 1 Ağustos 1916'daki Avam Kamarası açıklaması; bağımsızlık sonrası geri dönülmemesi)
- Lonely Planet (günde 2,5 milyon bardak; 1930'larda 5.000'den fazla çalışan, bugün ~600; tesisin kendi demiryolu ve St James's Caddesi'ndeki kapı)
- Wikipedia, *Guinness Brewery* (1759 kuruluş, Arthur Guinness)
Annual Daylight
Working Hours
8h overlap