Observatory log
Tokyo and Las Heras, compared
- 01Difference now
Las Heras is 12 hours behind Tokyo.
Tokyo: JST (UTC+9) · Las Heras: UTC−3 (UTC−3)
- 02Through 2026–2027
The difference stays the same all year.
- 1 January 2026 – 31 December 2027−12 h
Difference of Las Heras 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 Las Heras
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 Las Heras (yesterday) · 1 h.
- 05Weekend
Tokyo: Saturday and Sunday
Las Heras: Saturday and Sunday
24 hours
A day in Tokyo, in Las Heras
| Tokyo | Las Heras | 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 Las Heras
More time differences with Tokyo
Questions
Asked about Tokyo and Las Heras
What is the time difference between Tokyo and Las Heras?
Las Heras is 12 hours behind Tokyo. The difference stays the same all year.
What is the best time for a call between Tokyo and Las Heras?
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 Las Heras · 1 h; Tue–Fri: 09:00–10:00 in Tokyo = 21:00–22:00 in Las Heras (yesterday) · 1 h.
When does the time difference between Tokyo and Las Heras change?
It does not change in the next 12 months: Tokyo and Las Heras either keep the same time all year or change their clocks on the same dates.