O'Fallon, IL to Chiang Mai: time difference
Chiang Mai is 12 h ahead of O'Fallon, IL. 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.
O'Fallon, IL 18:29 6:29 PM Chiang Mai 06:29 6:29 AM You –:–
18:29 6:29 PM
Central Daylight Time · UTC-5
☀️ 07:15 · 🌙 18:15
06:29 6:29 AM
Indochina Time · UTC+7
☀️ 06:21 · 🌙 17:58
·
+12 h
Chiang Mai is 12 h ahead of O'Fallon, IL.
When you, O'Fallon, IL 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
🇺🇸 O'Fallon, IL
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
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 10 10 AM 11 11 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 O'Fallon, IL | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 18:29 | 06:29 |
| Local date | Wednesday, October 21, 2026 | Thursday, October 22, 2026 |
| Time zone | Central Daylight Time | Indochina Time |
| UTC offset | UTC-5 | UTC+7 |
| Offset from O'Fallon, IL | — | +12 h |
| IANA zone | America/Chicago | Asia/Bangkok |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | Not observed |
| Sunrise | 07:15 | 06:21 |
| Sunset | 18:15 | 17:58 |
| Daylight | 10 h 59 min | 11 h 37 min |
| People on this clock | 94,074 | 127,240 |
Compare O'Fallon, IL with another city
More comparisons with O'Fallon, IL: the time zones next to it and the far side of the clock.
Nearby time zones
O'Fallon, IL and Chiang Mai: common questions
How many hours ahead of O'Fallon, IL, is Chiang Mai?
The clocks in Chiang Mai are 12 hours ahead of those in O'Fallon (UTC+7 and UTC−5).
What time is it in Chiang Mai when it is 9:00 AM in O'Fallon, IL?
When it is 9:00 AM in O'Fallon, it is 9:00 PM in Chiang Mai.
What time is it in Chiang Mai at the end of the working day in O'Fallon, IL?
The working day in O'Fallon ends at 6:00 PM; in Chiang Mai it is 6:00 AM (the next day) at that moment.
When do working hours in O'Fallon, IL, and in Chiang Mai overlap?
They don't: there are no shared working hours. The start of the day in O'Fallon (9:00 AM) is 9:00 PM in Chiang Mai, and the start of the day in Chiang Mai is 9:00 PM (the previous day) in O'Fallon.
From what time in O'Fallon, IL, is it tomorrow in Chiang Mai?
Once it is 12:00 PM in O'Fallon, the date in Chiang Mai has already changed. Until 12:00 PM in Chiang Mai, it is still the previous day in O'Fallon.
Is the time difference between O'Fallon, IL, and Chiang Mai the same all year?
No. Only O'Fallon switches to summer time, so the gap changes twice a year. From November 1, 2026, Chiang Mai will be 13 hours ahead of O'Fallon.
