Observatory log
Mumbai and San Mateo, compared
- 01Difference now
San Mateo is 12 hours 30 minutes behind Mumbai.
Mumbai: IST (UTC+5:30) · San Mateo: PDT (UTC−7)
Next changeFrom 1 November 2026: San Mateo is 13 hours 30 minutes behind Mumbai.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−13 h 30 min
- 8 March 2026 – 1 November 2026−12 h 30 min
- 1 November 2026 – 14 March 2027−13 h 30 min
- 14 March 2027 – 7 November 2027−12 h 30 min
- 7 November 2027 – 31 December 2027−13 h 30 min
Difference of San Mateo from Mumbai. 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
21:30–22:00 in Mumbai = 09:00–09:30 in San Mateo
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Tue–Fri: 09:00–10:30 in Mumbai = 20:30–22:00 in San Mateo (yesterday) · 1 h 30 min.
- 05Weekend
Mumbai: Saturday and Sunday
San Mateo: Saturday and Sunday
24 hours
A day in Mumbai, in San Mateo
| Mumbai | San Mateo | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 11:30Yesterday | |
| 01:00 | 12:30Yesterday | |
| 02:00 | 13:30Yesterday | |
| 03:00 | 14:30Yesterday | |
| 04:00 | 15:30Yesterday | |
| 05:00 | 16:30Yesterday | |
| 06:00 | 17:30Yesterday | |
| 07:00 | 18:30Yesterday | |
| 08:00 | 19:30Yesterday | |
| 09:00 | 20:30Yesterday | |
| 10:00 | 21:30Yesterday | |
| 11:00 | 22:30Yesterday | |
| 12:00 | 23:30Yesterday | |
| 13:00 | 00:30 | |
| 14:00 | 01:30 | |
| 15:00 | 02:30 | |
| 16:00 | 03:30 | |
| 17:00 | 04:30 | |
| 18:00 | 05:30 | |
| 19:00 | 06:30 | |
| 20:00 | 07:30 | |
| 21:00 | 08:30 | |
| 22:00 | 09:30 | |
| 23:00 | 10:30 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Mumbai and San Mateo
More time differences with Mumbai
Questions
Asked about Mumbai and San Mateo
What is the time difference between Mumbai and San Mateo?
San Mateo is 12 hours 30 minutes behind Mumbai. This holds until 1 November 2026; then San Mateo is 13 hours 30 minutes behind Mumbai.
What is the best time for a call between Mumbai and San Mateo?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 21:30–22:00 in Mumbai = 09:00–09:30 in San Mateo · 30 min; Tue–Fri: 09:00–10:30 in Mumbai = 20:30–22:00 in San Mateo (yesterday) · 1 h 30 min.
When does the time difference between Mumbai and San Mateo change?
In the next 12 months it changes on: 1 November 2026 (−13 h 30 min); 14 March 2027 (−12 h 30 min).