Observatory log
Tokyo and Grytviken, compared
- 01Difference now
Grytviken is 11 hours behind Tokyo.
Tokyo: JST (UTC+9) · Grytviken: UTC−2 (UTC−2)
- 02Through 2026–2027
The difference stays the same all year.
- 1 January 2026 – 31 December 2027−11 h
Difference of Grytviken 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
20:00–22:00 in Tokyo = 09:00–11:00 in Grytviken
No shared office hours: this is early or late for one side (Mon–Fri).
- 05Weekend
Tokyo: Saturday and Sunday
Grytviken: Saturday and Sunday
24 hours
A day in Tokyo, in Grytviken
| Tokyo | Grytviken | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 13:00Yesterday | |
| 01:00 | 14:00Yesterday | |
| 02:00 | 15:00Yesterday | |
| 03:00 | 16:00Yesterday | |
| 04:00 | 17:00Yesterday | |
| 05:00 | 18:00Yesterday | |
| 06:00 | 19:00Yesterday | |
| 07:00 | 20:00Yesterday | |
| 08:00 | 21:00Yesterday | |
| 09:00 | 22:00Yesterday | |
| 10:00 | 23:00Yesterday | |
| 11:00 | 00:00 | |
| 12:00 | 01:00 | |
| 13:00 | 02:00 | |
| 14:00 | 03:00 | |
| 15:00 | 04:00 | |
| 16:00 | 05:00 | |
| 17:00 | 06:00 | |
| 18:00 | 07:00 | |
| 19:00 | 08:00 | |
| 20:00 | 09:00 | |
| 21:00 | 10:00 | |
| 22:00 | 11:00 | |
| 23:00 | 12:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Tokyo and Grytviken
More time differences with Tokyo
Questions
Asked about Tokyo and Grytviken
What is the time difference between Tokyo and Grytviken?
Grytviken is 11 hours behind Tokyo. The difference stays the same all year.
What is the best time for a call between Tokyo and Grytviken?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 20:00–22:00 in Tokyo = 09:00–11:00 in Grytviken · 2 h.
When does the time difference between Tokyo and Grytviken change?
It does not change in the next 12 months: Tokyo and Grytviken either keep the same time all year or change their clocks on the same dates.