Observatory log
Tokyo and Kilkenny, compared
- 01Difference now
Kilkenny is 8 hours behind Tokyo.
Tokyo: JST (UTC+9) · Kilkenny: IST (UTC+1)
Next changeFrom 25 October 2026: Kilkenny is 9 hours behind Tokyo.
- 02Through 2026–2027
- 1 January 2026 – 29 March 2026−9 h
- 29 March 2026 – 25 October 2026−8 h
- 25 October 2026 – 28 March 2027−9 h
- 28 March 2027 – 31 October 2027−8 h
- 31 October 2027 – 31 December 2027−9 h
Difference of Kilkenny from Tokyo. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
Their working days never overlap.
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
14:00–22:00 in Tokyo = 06:00–14:00 in Kilkenny
No shared office hours: this is early or late for one side (Tue–Fri).
Also possible: Mon: 18:00–22:00 in Tokyo = 09:00–13:00 in Kilkenny · 4 h.
- 05Weekend
Tokyo: Saturday and Sunday
Kilkenny: Saturday and Sunday
24 hours
A day in Tokyo, in Kilkenny
| Tokyo | Kilkenny | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 16:00Yesterday | |
| 01:00 | 17:00Yesterday | |
| 02:00 | 18:00Yesterday | |
| 03:00 | 19:00Yesterday | |
| 04:00 | 20:00Yesterday | |
| 05:00 | 21:00Yesterday | |
| 06:00 | 22:00Yesterday | |
| 07:00 | 23:00Yesterday | |
| 08:00 | 00:00 | |
| 09:00 | 01:00 | |
| 10:00 | 02:00 | |
| 11:00 | 03:00 | |
| 12:00 | 04:00 | |
| 13:00 | 05:00 | |
| 14:00 | 06:00 | |
| 15:00 | 07:00 | |
| 16:00 | 08:00 | |
| 17:00 | 09:00 | |
| 18:00 | 10:00 | |
| 19:00 | 11:00 | |
| 20:00 | 12:00 | |
| 21:00 | 13:00 | |
| 22:00 | 14:00 | |
| 23:00 | 15:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Tokyo and Kilkenny
More time differences with Tokyo
Questions
Asked about Tokyo and Kilkenny
What is the time difference between Tokyo and Kilkenny?
Kilkenny is 8 hours behind Tokyo. This holds until 25 October 2026; then Kilkenny is 9 hours behind Tokyo.
What is the best time for a call between Tokyo and Kilkenny?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 14:00–22:00 in Tokyo = 06:00–14:00 in Kilkenny · 8 h; Mon: 18:00–22:00 in Tokyo = 09:00–13:00 in Kilkenny · 4 h.
When does the time difference between Tokyo and Kilkenny change?
In the next 12 months it changes on: 25 October 2026 (−9 h); 28 March 2027 (−8 h).