Phuket to San Mateo, CA: time difference
San Mateo, CA is 14 h behind Phuket. 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.
Phuket 23:46 11:46 PM San Mateo, CA 09:46 9:46 AM You –:–
23:46 11:46 PM
Indochina Time · UTC+7
☀️ 06:14 · 🌙 18:10
09:46 9:46 AM
Pacific Daylight Time · UTC-7
☀️ 07:21 · 🌙 18:29
·
−14 h
San Mateo, CA is 14 h behind Phuket.
When you, Phuket 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
🇹🇭 Phuket
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 | 🇹🇭 Phuket | 🇺🇸 San Mateo, CA |
|---|---|---|
| Local time | 23:46 | 09:46 |
| 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 Phuket | — | −14 h |
| IANA zone | Asia/Bangkok | America/Los Angeles |
| Daylight saving | Not observed | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 06:14 | 07:21 |
| Sunset | 18:10 | 18:29 |
| Daylight | 11 h 56 min | 11 h 8 min |
| People on this clock | 79,308 | 103,536 |
Compare Phuket with another city
More comparisons with Phuket: the time zones next to it and the far side of the clock.
Big time differences
Phuket and San Mateo, CA: common questions
How many hours behind Phuket is San Mateo, CA?
The clocks in San Mateo are 14 hours behind those in Phuket (UTC−7 and UTC+7).
What time is it in San Mateo, CA, at the start of the working day in Phuket?
The working day in Phuket starts at 9:00 AM; in San Mateo it is 7:00 PM (the previous day) at that moment.
What time is it in San Mateo, CA, at the end of the working day in Phuket?
The working day in Phuket ends at 6:00 PM; in San Mateo it is 4:00 AM at that moment.
When do working hours in Phuket and in San Mateo, CA, overlap?
They don't: there are no shared working hours. The start of the day in Phuket (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 Phuket.
When is it still the previous day in San Mateo, CA?
Until 2:00 PM in Phuket it is still the previous day in San Mateo. The other way round, from 10:00 AM in San Mateo it is already the next day in Phuket.
Is the time difference between Phuket and San Mateo, CA, the same all year?
No. Only San Mateo switches to summer time, so the gap changes twice a year. From November 1, 2026, San Mateo will be 15 hours behind Phuket.
