Boulder, CO to Chiang Mai: time difference
Chiang Mai is 13 h ahead of Boulder, CO. 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.
Boulder, CO 15:10 3:10 PM Chiang Mai 04:10 4:10 AM You –:–
15:10 3:10 PM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
04:10 4:10 AM
Indochina Time · UTC+7
☀️ 06:20 · 🌙 17:58
·
+13 h
Chiang Mai is 13 h ahead of Boulder, CO.
When you, Boulder, CO 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
🇺🇸 Boulder, CO
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
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 12 12 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇺🇸 Boulder, CO | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 15:10 | 04:10 |
| Local date | Tuesday, October 20, 2026 | Wednesday, October 21, 2026 |
| Time zone | Mountain Daylight Time | Indochina Time |
| UTC offset | UTC-6 | UTC+7 |
| Offset from Boulder, CO | — | +13 h |
| IANA zone | America/Denver | Asia/Bangkok |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:19 | 06:20 |
| Sunset | 18:17 | 17:58 |
| Daylight | 10 h 58 min | 11 h 38 min |
| People on this clock | 106,803 | 127,240 |
Compare Boulder, CO with another city
More comparisons with Boulder, CO: the time zones next to it and the far side of the clock.
Nearby time zones
Boulder, CO and Chiang Mai: common questions
How far ahead of Boulder, CO, is Chiang Mai?
Chiang Mai is 13 hours ahead of Boulder: UTC+7 against UTC−6.
What time is it in Chiang Mai at the start of the working day in Boulder, CO?
The working day in Boulder starts at 9:00 AM; in Chiang Mai it is 10:00 PM at that moment.
If it is 6:00 PM in Boulder, CO, what time is it in Chiang Mai?
At 6:00 PM in Boulder, clocks in Chiang Mai show 7:00 AM (the next day).
Is there a time when both Boulder, CO, and Chiang Mai are at work?
No, the working days (9:00 AM–6:00 PM) do not overlap. When the day starts in Boulder at 9:00 AM, it is 10:00 PM in Chiang Mai; the day in Chiang Mai starts at 8:00 PM (the previous day) in Boulder time.
From what time in Boulder, CO, is it tomorrow in Chiang Mai?
Once it is 11:00 AM in Boulder, the date in Chiang Mai has already changed. Until 1:00 PM in Chiang Mai, it is still the previous day in Boulder.
Does the time gap between Boulder, CO, and Chiang Mai change during the year?
Yes – daylight saving time is used in Boulder but not in Chiang Mai. From November 1, 2026, Chiang Mai will be 14 hours ahead of Boulder.
