Observatory log
Tokyo and La Serena, compared
- 01Difference now
La Serena is 12 hours behind Tokyo.
Tokyo: JST (UTC+9) · La Serena: UTC−3 (UTC−3)
Next changeFrom 3 April 2027: La Serena 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 La Serena 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 La Serena
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 La Serena (yesterday) · 1 h.
- 05Weekend
Tokyo: Saturday and Sunday
La Serena: Saturday and Sunday
24 hours
A day in Tokyo, in La Serena
| Tokyo | La Serena | 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 La Serena
More time differences with Tokyo
Questions
Asked about Tokyo and La Serena
What is the time difference between Tokyo and La Serena?
La Serena is 12 hours behind Tokyo. This holds until 3 April 2027; then La Serena is 13 hours behind Tokyo.
What is the best time for a call between Tokyo and La Serena?
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 La Serena · 1 h; Tue–Fri: 09:00–10:00 in Tokyo = 21:00–22:00 in La Serena (yesterday) · 1 h.
When does the time difference between Tokyo and La Serena change?
In the next 12 months it changes on: 3 April 2027 (−13 h); 5 September 2027 (−12 h).