Chiang Mai to Ontario, CA: time difference
Ontario, 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 02:39 2:39 AM Ontario, CA 12:39 12:39 PM You –:–
02:39 2:39 AM
Indochina Time · UTC+7
☀️ 06:19 · 🌙 18:01
12:39 12:39 PM
Pacific Daylight Time · UTC-7
☀️ 06:58 · 🌙 18:15
·
−14 h
Ontario, CA is 14 h behind Chiang Mai.
When you, Chiang Mai and Ontario, 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
🇺🇸 Ontario, 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 | 🇺🇸 Ontario, CA |
|---|---|---|
| Local time | 02:39 | 12:39 |
| Local date | Sunday, October 18, 2026 | Saturday, October 17, 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 | 06:58 |
| Sunset | 18:01 | 18:15 |
| Daylight | 11 h 41 min | 11 h 17 min |
| People on this clock | 127,240 | 185,000 |
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 Ontario, CA: common questions
How many hours behind Chiang Mai is Ontario, CA?
The clocks in Ontario are 14 hours behind those in Chiang Mai (UTC−7 and UTC+7).
What time is it in Ontario, 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 Ontario.
What time is it in Ontario, CA, at the end of the working day in Chiang Mai?
The working day in Chiang Mai ends at 6:00 PM; in Ontario it is 4:00 AM at that moment.
When is a good time to call Ontario, CA, from Chiang Mai?
Working hours (9:00 AM–6:00 PM) in Chiang Mai and in Ontario do not overlap. At 9:00 AM in Chiang Mai it is 7:00 PM (the previous day) in Ontario; when the working day starts in Ontario, it is 11:00 PM in Chiang Mai.
When is it still the previous day in Ontario, CA?
Until 2:00 PM in Chiang Mai it is still the previous day in Ontario. The other way round, from 10:00 AM in Ontario it is already the next day in Chiang Mai.
Does the time gap between Chiang Mai and Ontario, CA, change during the year?
Yes – daylight saving time is used in Ontario but not in Chiang Mai. From November 1, 2026, Ontario will be 15 hours behind Chiang Mai.
