Observatory log
Tokyo and Rio Bueno, compared
- 01Difference now
Rio Bueno is 12 hours behind Tokyo.
Tokyo: JST (UTC+9) · Rio Bueno: UTC−3 (UTC−3)
Next changeFrom 3 April 2027: Rio Bueno is 13 hours behind Tokyo.
- 02Through 2026–2027
- 1 January 2026 – 4 April 2026−12 h
- 4 April 2026 – 6 September 2026−13 h
- 6 September 2026 – 3 April 2027−12 h
- 3 April 2027 – 5 September 2027−13 h
- 5 September 2027 – 31 December 2027−12 h
Difference of Rio Bueno 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
21:00–22:00 in Tokyo = 09:00–10:00 in Rio Bueno
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Tue–Fri: 09:00–10:00 in Tokyo = 21:00–22:00 in Rio Bueno (yesterday) · 1 h.
- 05Weekend
Tokyo: Saturday and Sunday
Rio Bueno: Saturday and Sunday
24 hours
A day in Tokyo, in Rio Bueno
| Tokyo | Rio Bueno | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 12:00Yesterday | |
| 01:00 | 13:00Yesterday | |
| 02:00 | 14:00Yesterday | |
| 03:00 | 15:00Yesterday | |
| 04:00 | 16:00Yesterday | |
| 05:00 | 17:00Yesterday | |
| 06:00 | 18:00Yesterday | |
| 07:00 | 19:00Yesterday | |
| 08:00 | 20:00Yesterday | |
| 09:00 | 21:00Yesterday | |
| 10:00 | 22:00Yesterday | |
| 11:00 | 23:00Yesterday | |
| 12:00 | 00:00 | |
| 13:00 | 01:00 | |
| 14:00 | 02:00 | |
| 15:00 | 03:00 | |
| 16:00 | 04:00 | |
| 17:00 | 05:00 | |
| 18:00 | 06:00 | |
| 19:00 | 07:00 | |
| 20:00 | 08:00 | |
| 21:00 | 09:00 | |
| 22:00 | 10:00 | |
| 23:00 | 11:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Tokyo and Rio Bueno
More time differences with Tokyo
Questions
Asked about Tokyo and Rio Bueno
What is the time difference between Tokyo and Rio Bueno?
Rio Bueno is 12 hours behind Tokyo. This holds until 3 April 2027; then Rio Bueno is 13 hours behind Tokyo.
What is the best time for a call between Tokyo and Rio Bueno?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 21:00–22:00 in Tokyo = 09:00–10:00 in Rio Bueno · 1 h; Tue–Fri: 09:00–10:00 in Tokyo = 21:00–22:00 in Rio Bueno (yesterday) · 1 h.
When does the time difference between Tokyo and Rio Bueno change?
In the next 12 months it changes on: 3 April 2027 (−13 h); 5 September 2027 (−12 h).