Observatory log
Tokyo and San Ramon, compared
- 01Difference now
San Ramon is 14 hours behind Tokyo.
Tokyo: JST (UTC+9) · San Ramon: UTC−5 (UTC−5)
- 02Through 2026–2027
The difference stays the same all year.
- 1 January 2026 – 31 December 2027−14 h
Difference of San Ramon 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
09:00–12:00 in Tokyo = 19:00–22:00 in San Ramon
No shared office hours: this is early or late for one side (Tue–Fri).
Also possible: Tue–Fri: 06:00–07:00 in Tokyo = 16:00–17:00 in San Ramon (yesterday) · 1 h.
- 05Weekend
Tokyo: Saturday and Sunday
San Ramon: Saturday and Sunday
24 hours
A day in Tokyo, in San Ramon
| Tokyo | San Ramon | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 10:00Yesterday | |
| 01:00 | 11:00Yesterday | |
| 02:00 | 12:00Yesterday | |
| 03:00 | 13:00Yesterday | |
| 04:00 | 14:00Yesterday | |
| 05:00 | 15:00Yesterday | |
| 06:00 | 16:00Yesterday | |
| 07:00 | 17:00Yesterday | |
| 08:00 | 18:00Yesterday | |
| 09:00 | 19:00Yesterday | |
| 10:00 | 20:00Yesterday | |
| 11:00 | 21:00Yesterday | |
| 12:00 | 22:00Yesterday | |
| 13:00 | 23:00Yesterday | |
| 14:00 | 00:00 | |
| 15:00 | 01:00 | |
| 16:00 | 02:00 | |
| 17:00 | 03:00 | |
| 18:00 | 04:00 | |
| 19:00 | 05:00 | |
| 20:00 | 06:00 | |
| 21:00 | 07:00 | |
| 22:00 | 08:00 | |
| 23:00 | 09:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Tokyo and San Ramon
More time differences with Tokyo
Questions
Asked about Tokyo and San Ramon
What is the time difference between Tokyo and San Ramon?
San Ramon is 14 hours behind Tokyo. The difference stays the same all year.
What is the best time for a call between Tokyo and San Ramon?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 09:00–12:00 in Tokyo = 19:00–22:00 in San Ramon (yesterday) · 3 h; Tue–Fri: 06:00–07:00 in Tokyo = 16:00–17:00 in San Ramon (yesterday) · 1 h.
When does the time difference between Tokyo and San Ramon change?
It does not change in the next 12 months: Tokyo and San Ramon either keep the same time all year or change their clocks on the same dates.