Chiang Mai to San Mateo, CA: time difference
San Mateo, CA is 14 h behind Chiang Mai. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Chiang Mai 20:13 8:13 PM San Mateo, CA 06:13 6:13 AM You –:–
20:13 8:13 PM
Indochina Time · UTC+7
☀️ 06:19 · 🌙 18:01
06:13 6:13 AM
Pacific Daylight Time · UTC-7
☀️ 07:21 · 🌙 18:29
·
−14 h
San Mateo, CA is 14 h behind Chiang Mai.
When you, Chiang Mai and San Mateo, CA are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇹🇭 Chiang Mai
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 San Mateo, CA
10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇹🇭 Chiang Mai | 🇺🇸 San Mateo, CA |
|---|---|---|
| Local time | 20:13 | 06:13 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Indochina Time | Pacific Daylight Time |
| UTC offset | UTC+7 | UTC-7 |
| Offset from Chiang Mai | — | −14 h |
| IANA zone | Asia/Bangkok | America/Los Angeles |
| Daylight saving | Not observed | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 06:19 | 07:21 |
| Sunset | 18:01 | 18:29 |
| Daylight | 11 h 41 min | 11 h 8 min |
| People on this clock | 127,240 | 103,536 |
Compare Chiang Mai with another city
More comparisons with Chiang Mai: the time zones next to it and the far side of the clock.
Big time differences
Chiang Mai and San Mateo, CA: common questions
How far behind Chiang Mai is San Mateo, CA?
San Mateo is 14 hours behind Chiang Mai: UTC−7 against UTC+7.
What time is it in San Mateo, CA, when it is 9:00 AM in Chiang Mai?
When it is 9:00 AM in Chiang Mai, it is 7:00 PM (the previous day) in San Mateo.
If it is 6:00 PM in Chiang Mai, what time is it in San Mateo, CA?
At 6:00 PM in Chiang Mai, clocks in San Mateo show 4:00 AM.
When do working hours in Chiang Mai and in San Mateo, CA, overlap?
They don't: there are no shared working hours. The start of the day in Chiang Mai (9:00 AM) is 7:00 PM (the previous day) in San Mateo, and the start of the day in San Mateo is 11:00 PM in Chiang Mai.
When does the date change in San Mateo, CA, compared with Chiang Mai?
The new day starts in San Mateo later: until 2:00 PM in Chiang Mai, it is still the previous day there. From 10:00 AM in San Mateo, Chiang Mai is already on the next day.
Does the time difference between Chiang Mai and San Mateo, CA, change?
Yes. The clocks change only in San Mateo. From November 1, 2026, San Mateo will be 15 hours behind Chiang Mai.
