Boston, MA to Chiang Mai: time difference
Chiang Mai is 11 h ahead of Boston, MA. 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.
Boston, MA 20:26 8:26 PM Chiang Mai 07:26 7:26 AM You –:–
20:26 8:26 PM
Eastern Daylight Time · UTC-4
☀️ 06:51 · 🌙 18:14
07:26 7:26 AM
Indochina Time · UTC+7
☀️ 06:17 · 🌙 18:07
·
+11 h
Chiang Mai is 11 h ahead of Boston, MA.
When you, Boston, MA 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
🇺🇸 Boston, MA
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
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 | 🇺🇸 Boston, MA | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 20:26 | 07:26 |
| Local date | Friday, October 9, 2026 | Saturday, October 10, 2026 |
| Time zone | Eastern Daylight Time | Indochina Time |
| UTC offset | UTC-4 | UTC+7 |
| Offset from Boston, MA | — | +11 h |
| IANA zone | America/New York | Asia/Bangkok |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 06:51 | 06:17 |
| Sunset | 18:14 | 18:07 |
| Daylight | 11 h 23 min | 11 h 49 min |
| People on this clock | 675,647 | 127,240 |
Compare Boston, MA with another city
More comparisons with Boston, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Boston, MA and Chiang Mai: common questions
How many hours ahead of Boston, MA, is Chiang Mai?
The clocks in Chiang Mai are 11 hours ahead of those in Boston (UTC+7 and UTC−4).
What time is it in Chiang Mai at the start of the working day in Boston, MA?
The working day in Boston starts at 9:00 AM; in Chiang Mai it is 8:00 PM at that moment.
What time is it in Chiang Mai at the end of the working day in Boston, MA?
The working day in Boston ends at 6:00 PM; in Chiang Mai it is 5:00 AM (the next day) at that moment.
When do working hours in Boston, MA, and in Chiang Mai overlap?
They don't: there are no shared working hours. The start of the day in Boston (9:00 AM) is 8:00 PM in Chiang Mai, and the start of the day in Chiang Mai is 10:00 PM (the previous day) in Boston.
When is it already the next day in Chiang Mai?
From 1:00 PM in Boston, MA, it is already the next day in Chiang Mai. The other way round, until 11:00 AM in Chiang Mai it is still the previous day in Boston.
Is the time difference between Boston, MA, and Chiang Mai the same all year?
No. Only Boston switches to summer time, so the gap changes twice a year. From November 1, 2026, Chiang Mai will be 12 hours ahead of Boston.
