Portsmouth, OH to Chiang Mai: time difference
Chiang Mai is 11 h ahead of Portsmouth, OH. 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.
Portsmouth, OH 18:50 6:50 PM Chiang Mai 05:50 5:50 AM You –:–
18:50 6:50 PM
Eastern Daylight Time · UTC-4
☀️ 07:47 · 🌙 18:48
05:50 5:50 AM
Indochina Time · UTC+7
☀️ 06:20 · 🌙 17:58
·
+11 h
Chiang Mai is 11 h ahead of Portsmouth, OH.
When you, Portsmouth, OH 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
🇺🇸 Portsmouth, OH
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 | 🇺🇸 Portsmouth, OH | 🇹🇭 Chiang Mai |
|---|---|---|
| Local time | 18:50 | 05:50 |
| Local date | Tuesday, October 20, 2026 | Wednesday, October 21, 2026 |
| Time zone | Eastern Daylight Time | Indochina Time |
| UTC offset | UTC-4 | UTC+7 |
| Offset from Portsmouth, OH | — | +11 h |
| IANA zone | America/New York | Asia/Bangkok |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:47 | 06:20 |
| Sunset | 18:48 | 17:58 |
| Daylight | 11 h 1 min | 11 h 38 min |
| People on this clock | 95,535 | 127,240 |
Compare Portsmouth, OH with another city
More comparisons with Portsmouth, OH: the time zones next to it and the far side of the clock.
Nearby time zones
Portsmouth, OH and Chiang Mai: common questions
What is the time difference between Portsmouth, OH, and Chiang Mai?
Chiang Mai is 11 hours ahead: it uses UTC+7, while Portsmouth is on UTC−4.
If it is 9:00 AM in Portsmouth, OH, what time is it in Chiang Mai?
At 9:00 AM in Portsmouth, clocks in Chiang Mai show 8:00 PM.
What time is it in Chiang Mai when it is 6:00 PM in Portsmouth, OH?
When it is 6:00 PM in Portsmouth, it is 5:00 AM (the next day) in Chiang Mai.
When do working hours in Portsmouth, OH, and in Chiang Mai overlap?
They don't: there are no shared working hours. The start of the day in Portsmouth (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 Portsmouth.
When does the date change in Chiang Mai compared with Portsmouth, OH?
The new day starts in Chiang Mai earlier: at 1:00 PM in Portsmouth it is already midnight there. Until 11:00 AM in Chiang Mai, Portsmouth is still on the previous day.
Does the time difference between Portsmouth, OH, and Chiang Mai change?
Yes. The clocks change only in Portsmouth. From November 1, 2026, Chiang Mai will be 12 hours ahead of Portsmouth.
