San Mateo, CA to Chiang Mai: time difference
Chiang Mai is 14 h ahead of San Mateo, CA. 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.
San Mateo, CA 05:25 5:25 AM Chiang Mai 19:25 7:25 PM You –:–
05:25 5:25 AM
Pacific Daylight Time · UTC-7
☀️ 07:21 · 🌙 18:29
19:25 7:25 PM
Indochina Time · UTC+7
☀️ 06:19 · 🌙 18:01
·
+14 h
Chiang Mai is 14 h ahead of San Mateo, CA.
When you, San Mateo, CA and Chiang Mai are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 San Mateo, CA
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
🇹🇭 Chiang Mai
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 10 10 AM 11 11 AM 12 12 PM 13 1 PM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 San Mateo, CA | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 05:25 | 19:25 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Pacific Daylight Time | Indochina Time |
| UTC offset | UTC-7 | UTC+7 |
| Offset from San Mateo, CA | — | +14 h |
| IANA zone | America/Los Angeles | Asia/Bangkok |
| Daylight saving | On summer time → UTC-8, Nov 1, 01:00 | Not observed |
| Sunrise | 07:21 | 06:19 |
| Sunset | 18:29 | 18:01 |
| Daylight | 11 h 8 min | 11 h 41 min |
| People on this clock | 103,536 | 127,240 |
Compare San Mateo, CA with another city
More comparisons with San Mateo, CA: the time zones next to it and the far side of the clock.
Nearby time zones
San Mateo, CA and Chiang Mai: common questions
How far ahead of San Mateo, CA, is Chiang Mai?
Chiang Mai is 14 hours ahead of San Mateo: UTC+7 against UTC−7.
If it is 9:00 AM in San Mateo, CA, what time is it in Chiang Mai?
At 9:00 AM in San Mateo, clocks in Chiang Mai show 11:00 PM.
If it is 6:00 PM in San Mateo, CA, what time is it in Chiang Mai?
At 6:00 PM in San Mateo, clocks in Chiang Mai show 8:00 AM (the next day).
When is a good time to call Chiang Mai from San Mateo, CA?
Working hours (9:00 AM–6:00 PM) in San Mateo and in Chiang Mai do not overlap. At 9:00 AM in San Mateo it is 11:00 PM in Chiang Mai; when the working day starts in Chiang Mai, it is 7:00 PM (the previous day) in San Mateo.
When does the date change in Chiang Mai compared with San Mateo, CA?
The new day starts in Chiang Mai earlier: at 10:00 AM in San Mateo it is already midnight there. Until 2:00 PM in Chiang Mai, San Mateo is still on the previous day.
Is the time difference between San Mateo, CA, and Chiang Mai the same all year?
No. Only San Mateo switches to summer time, so the gap changes twice a year. From November 1, 2026, Chiang Mai will be 15 hours ahead of San Mateo.
