Observatory log
Tokyo and Waterbury, compared
- 01Difference now
Waterbury is 13 hours behind Tokyo.
Tokyo: JST (UTC+9) · Waterbury: EDT (UTC−4)
Next changeFrom 1 November 2026: Waterbury is 14 hours behind Tokyo.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−14 h
- 8 March 2026 – 1 November 2026−13 h
- 1 November 2026 – 14 March 2027−14 h
- 14 March 2027 – 7 November 2027−13 h
- 7 November 2027 – 31 December 2027−14 h
Difference of Waterbury 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
09:00–11:00 in Tokyo = 20:00–22:00 in Waterbury
No shared office hours: this is early or late for one side (Tue–Fri).
- 05Weekend
Tokyo: Saturday and Sunday
Waterbury: Saturday and Sunday
24 hours
A day in Tokyo, in Waterbury
| Tokyo | Waterbury | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 11:00Yesterday | |
| 01:00 | 12:00Yesterday | |
| 02:00 | 13:00Yesterday | |
| 03:00 | 14:00Yesterday | |
| 04:00 | 15:00Yesterday | |
| 05:00 | 16:00Yesterday | |
| 06:00 | 17:00Yesterday | |
| 07:00 | 18:00Yesterday | |
| 08:00 | 19:00Yesterday | |
| 09:00 | 20:00Yesterday | |
| 10:00 | 21:00Yesterday | |
| 11:00 | 22:00Yesterday | |
| 12:00 | 23:00Yesterday | |
| 13:00 | 00:00 | |
| 14:00 | 01:00 | |
| 15:00 | 02:00 | |
| 16:00 | 03:00 | |
| 17:00 | 04:00 | |
| 18:00 | 05:00 | |
| 19:00 | 06:00 | |
| 20:00 | 07:00 | |
| 21:00 | 08:00 | |
| 22:00 | 09:00 | |
| 23:00 | 10:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Tokyo and Waterbury
More time differences with Tokyo
Questions
Asked about Tokyo and Waterbury
What is the time difference between Tokyo and Waterbury?
Waterbury is 13 hours behind Tokyo. This holds until 1 November 2026; then Waterbury is 14 hours behind Tokyo.
What is the best time for a call between Tokyo and Waterbury?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 09:00–11:00 in Tokyo = 20:00–22:00 in Waterbury (yesterday) · 2 h.
When does the time difference between Tokyo and Waterbury change?
In the next 12 months it changes on: 1 November 2026 (−14 h); 14 March 2027 (−13 h).