JST to Dublin
-8hJST
JSTSOURCEDublin
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and GMT on the World Map
The map below highlights the JST (Japan Standard Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
Time Conversion Guide: JST to Dublin
JST (Japan Standard Time) operates on the Japan Standard Time (UTC+09:00). Dublin, Ireland uses Greenwich Mean Time (UTC+00:00).
The time difference between JST and Dublin is 480 minutes (+8h). When it's noon in JST, it's 04:00 AM in Dublin.
Why Convert JST to Dublin Time?
The time difference of 8 hours between JST and Dublin can significantly impact business operations and personal communication. By using this converter, you can easily find the overlapping business hours and schedule your interactions when both parties are available.
Remember: Daylight Saving Time changes can affect the time difference between JST and Dublin. Always double-check the current offset before scheduling important events.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best Time to Call Between JST and Dublin
If you want to reach someone in Dublin during standard business hours (9 AM – 5 PM GMT), the best time to call from JST would be:
- Dublin 9:00 AM = JST 05:00 PM
- Dublin 12:00 PM = JST 08:00 PM
- Dublin 5:00 PM = JST 01:00 AM
Business Hours Overlap
JST and Dublin have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
As a final note, managing the -8h difference between JST and Dublin is simple with the right tools. Keep this page handy for all your future time conversion needs.
🕐 Daylight Saving Time Info
JST
Does not observe DST
Dublin
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between JST and Dublin?
Dublin is -8h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is Dublin in?
Dublin operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in JST, what time is it in Dublin?
When it is 12:00 AM (midnight) in JST (JST), it is -8h later in Dublin (GMT).
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