Chiang Mai to Portsmouth, OH: time difference
Portsmouth, OH is 11 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 06:34 6:34 AM Portsmouth, OH 19:34 7:34 PM You –:–
06:34 6:34 AM
Indochina Time · UTC+7
☀️ 06:20 · 🌙 17:58
19:34 7:34 PM
Eastern Daylight Time · UTC-4
☀️ 07:47 · 🌙 18:48
·
−11 h
Portsmouth, OH is 11 h behind Chiang Mai.
When you, Chiang Mai and Portsmouth, OH 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
🇺🇸 Portsmouth, OH
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 | 🇹🇭 Chiang Mai | 🇺🇸 Portsmouth, OH |
|---|---|---|
| Local time | 06:34 | 19:34 |
| Local date | Wednesday, October 21, 2026 | Tuesday, October 20, 2026 |
| Time zone | Indochina Time | Eastern Daylight Time |
| UTC offset | UTC+7 | UTC-4 |
| Offset from Chiang Mai | — | −11 h |
| IANA zone | Asia/Bangkok | America/New York |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 06:20 | 07:47 |
| Sunset | 17:58 | 18:48 |
| Daylight | 11 h 38 min | 11 h 1 min |
| People on this clock | 127,240 | 95,535 |
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 Portsmouth, OH: common questions
How far behind Chiang Mai is Portsmouth, OH?
Portsmouth is 11 hours behind Chiang Mai: UTC−4 against UTC+7.
What time is it in Portsmouth, OH, at the start of the working day in Chiang Mai?
The working day in Chiang Mai starts at 9:00 AM; in Portsmouth it is 10:00 PM (the previous day) at that moment.
What time is it in Portsmouth, OH, at the end of the working day in Chiang Mai?
The working day in Chiang Mai ends at 6:00 PM; in Portsmouth it is 7:00 AM at that moment.
Is there a time when both Chiang Mai and Portsmouth, OH, 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 10:00 PM (the previous day) in Portsmouth; the day in Portsmouth starts at 8:00 PM in Chiang Mai time.
When is it still the previous day in Portsmouth, OH?
Until 11:00 AM in Chiang Mai it is still the previous day in Portsmouth. The other way round, from 1:00 PM in Portsmouth it is already the next day in Chiang Mai.
Is the time difference between Chiang Mai and Portsmouth, OH, the same all year?
No. Only Portsmouth switches to summer time, so the gap changes twice a year. From November 1, 2026, Portsmouth will be 12 hours behind Chiang Mai.
