When it is 09:00 in Dublin it is 18:00 in Tokyo in January and 17:00 in July. Tokyo is 9 hours ahead Dublin right now — but it is not constant: the difference is 9 hours ahead in January and 8 hours ahead in July. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between Dublin and Tokyo, with the offset for the date you pick.
Live times in Dublin and Tokyo
The two cities side by side. The January column uses the winter offsets (Dublin UTC+00:00, Tokyo UTC+09:00); the July column uses the summer offsets (Dublin UTC+01:00, Tokyo UTC+09:00).
| Time in Dublin | Tokyo in January | Tokyo in July |
|---|---|---|
| 00:00 | 09:00 | 08:00 |
| 06:00 | 15:00 | 14:00 |
| 09:00 | 18:00 | 17:00 |
| 12:00 | 21:00 | 20:00 |
| 15:00 | 00:00 | 23:00 |
| 17:00 | 02:00 | 01:00 |
| 21:00 | 06:00 | 05:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in Dublin and time in Tokyo — explain each city's time zone, offsets and daylight saving in full.
The time difference between Dublin and Tokyo
The difference is not constant. In January Tokyo is 9 hours ahead Dublin; in July it is 8 hours ahead Dublin. The difference changes on Sunday, 29 March 2026 (from 9 hours ahead to 8 hours ahead) and Sunday, 25 October 2026 (from 8 hours ahead to 9 hours ahead) — those are the dates when one of the two cities changes its clocks and the other does not, or when they change on different days. Between those dates the difference is one value; outside them it is the other.
To convert a time, add the difference: 09:00 in Dublin is 18:00 in Tokyo in January and 17:00 in July; 17:00 in Dublin — the end of the working day — is 02:00 in Tokyo in January and 01:00 in July. To go the other way, subtract it: 09:00 in Tokyo is 00:00 in Dublin in January. The time difference calculator does the arithmetic for any date, and the UTC to Tokyo page gives the full conversion table for Tokyo.
Meeting overlap between Dublin and Tokyo
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in Dublin's working day and shows what time they are in Tokyo.
January
| Dublin time | Tokyo time | Both working? |
|---|---|---|
| 09:00 | 18:00 | No |
| 10:00 | 19:00 | No |
| 11:00 | 20:00 | No |
| 12:00 | 21:00 | No |
| 13:00 | 22:00 | No |
| 14:00 | 23:00 | No |
| 15:00 | 00:00 | No |
| 16:00 | 01:00 | No |
July
| Dublin time | Tokyo time | Both working? |
|---|---|---|
| 09:00 | 17:00 | Yes |
| 10:00 | 18:00 | Yes |
| 11:00 | 19:00 | Yes |
| 12:00 | 20:00 | Yes |
| 13:00 | 21:00 | Yes |
| 14:00 | 22:00 | Yes |
| 15:00 | 23:00 | Yes |
| 16:00 | 00:00 | Yes |
In January the overlap is 0 hours: there is no hour when both cities are in their working day. In July it is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 Dublin time. The meeting planner finds the overlap for any two cities and any date, and the meeting time finder finds it for a whole team.
Daylight saving in Dublin and Tokyo
Dublin observes daylight saving: in 2026 the clocks go forward on 29 March 2026 and back on 25 October 2026, moving the offset from UTC+00:00 to UTC+01:00.
Tokyo does not observe daylight saving, so its offset of UTC+09:00 never changes.
The difference changes on Sunday, 29 March 2026 and Sunday, 25 October 2026 in 2026. On those dates, one city changes its clocks and the other does not — or they change on different days — so the difference moves by an hour. A standing meeting set in one city's local time will land an hour early or late on the other side until the second city catches up. The fix is to set the calendar event in UTC, or to check the overlap again after each change. The individual DST pages — Dublin DST 2026 and Tokyo DST 2026 — give the exact dates for each city.
Best meeting windows
In July the best windows are 09:00–17:00 in Dublin (17:00–01:00 in Tokyo) — the same logic, with the July offsets.
Calling and travel notes
When it is 09:00 in Dublin it is 18:00 in Tokyo in January; when it is 12:00 in Dublin it is 21:00 in Tokyo; when it is 17:00 in Dublin it is 02:00 in Tokyo. The difference is under 12 hours, so the two cities are usually on the same date — but check the date for late-evening and early-morning times, when the date can differ by a day. Scheduling between Asia and Europe works best in the late morning in Tokyo and the afternoon or evening in Dublin. The difference is 5–9 hours, so the overlap is a few hours in the middle of the day. The main trap is daylight saving: Europe changes its clocks twice a year, and most of Asia does not, so the difference — and the overlap — moves by an hour in March and October.
Worked conversions
Six conversions, for January (offsets Dublin UTC+00:00, Tokyo UTC+09:00):
| Dublin | Tokyo |
|---|---|
| 08:00 | 17:00 |
| 09:00 | 18:00 |
| 12:00 | 21:00 |
| 14:00 | 23:00 |
| 17:00 | 02:00 |
| 20:00 | 05:00 |
In July, add 1 hour to each Tokyo time. For the reverse direction, see Tokyo to Dublin time.
Dublin and Tokyo at a glance
| Fact | Dublin | Tokyo |
|---|---|---|
| Country | Ireland | Japan |
| Region | Europe | Asia |
| IANA time zone | Europe/Dublin |
Asia/Tokyo |
| Standard offset | UTC+00:00 | UTC+09:00 |
| Daylight saving offset | UTC+01:00 | — does not observe |
| Offset in January 2026 | UTC+00:00 | UTC+09:00 |
| Offset in July 2026 | UTC+01:00 | UTC+09:00 |
| Observes daylight saving | Yes | No |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in Dublin and time in Tokyo — explain each city's time zone, and the DST pages — Dublin DST 2026 and Tokyo DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between Dublin and Tokyo?
Tokyo is 9 hours ahead Dublin right now. In January the difference is 9 hours ahead and in July it is 8 hours ahead — it changes with daylight saving.
How do I schedule a recurring meeting between Dublin and Tokyo?
Pick a time inside the overlap — the edge of the day, since there is no overlap — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Tokyo when it is 09:00 in Dublin?
It is 18:00 in January and 17:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between Dublin and Tokyo?
There is no hour inside both working days. Meet at the edge of the day — early morning in one city, evening in the other — and rotate the awkward hour.
Does the time difference between Dublin and Tokyo change during the year?
Yes. It changes on Sunday, 29 March 2026 and Sunday, 25 October 2026 in 2026, when one city changes its clocks and the other does not.
What time is it in Dublin when it is 09:00 in Tokyo?
It is 00:00 in January and 01:00 in July. See Tokyo to Dublin time for the full comparison from Tokyo's side.
What are the time zones of Dublin and Tokyo?
Dublin is in Europe/Dublin (UTC+00:00 standard time) and Tokyo is in Asia/Tokyo (UTC+09:00 standard time).
What time is it in Dublin when it is midnight in Tokyo?
It is 15:00 in Dublin in January and 16:00 in July — the same day, because Dublin is ahead of Tokyo. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.