Chiang Mai to Helena, MT: time difference
Helena, MT is 13 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 18:37 6:37 PM Helena, MT 05:37 5:37 AM You –:–
18:37 6:37 PM
Indochina Time · UTC+7
☀️ 06:17 · 🌙 18:07
05:37 5:37 AM
Mountain Daylight Time · UTC-6
☀️ 07:39 · 🌙 18:52
·
−13 h
Helena, MT is 13 h behind Chiang Mai.
When you, Chiang Mai and Helena, MT 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
🇺🇸 Helena, MT
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 10 10 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇹🇭 Chiang Mai | 🇺🇸 Helena, MT |
|---|---|---|
| Local time | 18:37 | 05:37 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Indochina Time | Mountain Daylight Time |
| UTC offset | UTC+7 | UTC-6 |
| Offset from Chiang Mai | — | −13 h |
| IANA zone | Asia/Bangkok | America/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 06:17 | 07:39 |
| Sunset | 18:07 | 18:52 |
| Daylight | 11 h 49 min | 11 h 13 min |
| People on this clock | 127,240 | 32,091 |
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 Helena, MT: common questions
How many hours behind Chiang Mai is Helena, MT?
The clocks in Helena are 13 hours behind those in Chiang Mai (UTC−6 and UTC+7).
What time is it in Helena, MT, at the start of the working day in Chiang Mai?
The working day in Chiang Mai starts at 9:00 AM; in Helena it is 8:00 PM (the previous day) at that moment.
What time is it in Helena, MT, when it is 6:00 PM in Chiang Mai?
When it is 6:00 PM in Chiang Mai, it is 5:00 AM in Helena.
Is there a time when both Chiang Mai and Helena, MT, are at work?
No, the working days (9:00 AM–6:00 PM) do not overlap. When the day starts in Chiang Mai at 9:00 AM, it is 8:00 PM (the previous day) in Helena; the day in Helena starts at 10:00 PM in Chiang Mai time.
When is it still the previous day in Helena, MT?
Until 1:00 PM in Chiang Mai it is still the previous day in Helena. The other way round, from 11:00 AM in Helena it is already the next day in Chiang Mai.
Is the time difference between Chiang Mai and Helena, MT, the same all year?
No. Only Helena switches to summer time, so the gap changes twice a year. From November 1, 2026, Helena will be 14 hours behind Chiang Mai.
