Waltham, MA to Chiang Mai: time difference
Chiang Mai is 11 h ahead of Waltham, 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.
Waltham, MA 06:28 6:28 AM Chiang Mai 17:28 5:28 PM You –:–
06:28 6:28 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 18:00
17:28 5:28 PM
Indochina Time · UTC+7
☀️ 06:19 · 🌙 18:01
·
+11 h
Chiang Mai is 11 h ahead of Waltham, MA.
When you, Waltham, 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
🇺🇸 Waltham, 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
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Time zones side by side
| Detail | 🇺🇸 Waltham, MA | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 06:28 | 17:28 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Eastern Daylight Time | Indochina Time |
| UTC offset | UTC-4 | UTC+7 |
| Offset from Waltham, MA | — | +11 h |
| IANA zone | America/New York | Asia/Bangkok |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:02 | 06:19 |
| Sunset | 18:00 | 18:01 |
| Daylight | 10 h 58 min | 11 h 41 min |
| People on this clock | 60,636 | 127,240 |
Compare Waltham, MA with another city
More comparisons with Waltham, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Waltham, MA and Chiang Mai: common questions
What is the time difference between Waltham, MA, and Chiang Mai?
Chiang Mai is 11 hours ahead: it uses UTC+7, while Waltham is on UTC−4.
If it is 9:00 AM in Waltham, MA, what time is it in Chiang Mai?
At 9:00 AM in Waltham, clocks in Chiang Mai show 8:00 PM.
If it is 6:00 PM in Waltham, MA, what time is it in Chiang Mai?
At 6:00 PM in Waltham, clocks in Chiang Mai show 5:00 AM (the next day).
When do working hours in Waltham, MA, and in Chiang Mai overlap?
They don't: there are no shared working hours. The start of the day in Waltham (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 Waltham.
When is it already the next day in Chiang Mai?
From 1:00 PM in Waltham, 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 Waltham.
Does the time gap between Waltham, MA, and Chiang Mai change during the year?
Yes – daylight saving time is used in Waltham but not in Chiang Mai. From November 1, 2026, Chiang Mai will be 12 hours ahead of Waltham.
