What is the time difference between Tokyo and Dublin?

Tokyo is UTC+9 (JST) year-round. Dublin is UTC+0 (GMT) in winter and UTC+1 (IST) in summer. So Tokyo is 9 hours ahead of Dublin from late October to late March, and 8 hours ahead during Irish Summer Time (late March to late October).

Does Tokyo observe daylight saving time?

No. Japan abolished daylight saving time in 1952. Tokyo stays permanently at UTC+9 (Japan Standard Time) throughout the year.

When does Dublin switch 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).

What does IST stand for in the context of Dublin?

IST stands for Irish Standard Time (UTC+1), used in Ireland during summer daylight saving. It is not the same as India Standard Time (also IST, UTC+5:30).

What are good meeting times for both Tokyo and Dublin?

With an 8–9 hour gap, overlap is limited. A 17:00–18:00 Tokyo slot corresponds to 08:00–09:00 or 09:00–10:00 Dublin time depending on the season, which is just inside Dublin business hours. Alternatively, a very early Tokyo morning (07:00–08:00) aligns with a late Dublin afternoon (22:00–23:00), which is outside business hours.

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. Accuracy depends on your device clock, which is typically synchronized via NTP and accurate to within a second.

Time Difference: Tokyo to Dublin

Name: Time Difference: Tokyo to Dublin
Availability: InStock
Author: Nham Vu

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

Tokyo, Japan

--:--:--

JST UTC+9

Dublin, Ireland

--:--:--

GMT UTC+0

Current Offset

-- hours

Calculating...

Meeting Overlap Finder

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

Tokyo	Dublin	Status

Convert Tokyo Time to Dublin Time

Based on the current offset — updates automatically

Tokyo (JST)	Dublin (GMT/IST)

Summary

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

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo (JST, UTC+9) using the IANA timezone database.
The same moment is converted to Europe/Dublin (GMT in winter, IST in summer).
The UTC offsets of both cities are compared to produce the hour difference.
All values — Tokyo time, Dublin time, and the offset — refresh every second.
Dublin DST transitions are handled automatically; Tokyo never observes daylight saving.

Use cases

Scheduling video calls between Tokyo and Dublin teams.
Checking if a colleague in Dublin is in business hours when it is morning in Tokyo.
Planning travel between Japan and Ireland and knowing what time to land.
Remote teams coordinating standups across the JST–GMT/IST gap.
Finding the overlapping business hours window between Tokyo and Dublin.
Verifying the current GMT/IST abbreviation and UTC offset for Dublin.
Finance professionals tracking Japan and Irish market opening hours.
Students arranging online tutoring sessions between Japan and Ireland.

Frequently Asked Questions

Last updated: 2026-07-26 · Reviewed by Nham Vu