Buenos Aires to St. Thomas: time difference
St. Thomas is 1 h behind Buenos Aires. 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.
Buenos Aires 22:27 10:27 PM St. Thomas 21:27 9:27 PM You –:–
22:27 10:27 PM
Argentina Standard Time · UTC-3
☀️ 06:14 · 🌙 19:07
21:27 9:27 PM
Eastern Daylight Time · UTC-4
☀️ 07:37 · 🌙 18:46
·
−1 h
St. Thomas is 1 h behind Buenos Aires.
When you, Buenos Aires and St. Thomas are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
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
🇨🇦 St. Thomas
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 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇨🇦 St. Thomas |
|---|---|---|
| Local time | 22:27 | 21:27 |
| Local date | Wednesday, October 14, 2026 | Wednesday, October 14, 2026 |
| Time zone | Argentina Standard Time | Eastern Daylight Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Buenos Aires | — | −1 h |
| IANA zone | America/Argentina/Buenos Aires | America/Toronto |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 06:14 | 07:37 |
| Sunset | 19:07 | 18:46 |
| Daylight | 12 h 54 min | 11 h 8 min |
| People on this clock | 2,891,082 | 38,909 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and St. Thomas: common questions
How far behind Buenos Aires is St. Thomas?
St. Thomas is 1 hour behind Buenos Aires: UTC−4 against UTC−3.
What time is it in St. Thomas when it is 9:00 AM in Buenos Aires?
When it is 9:00 AM in Buenos Aires, it is 8:00 AM in St. Thomas.
What time is it in St. Thomas at the end of the working day in Buenos Aires?
The working day in Buenos Aires ends at 6:00 PM; in St. Thomas it is 5:00 PM at that moment.
When do working hours in Buenos Aires and in St. Thomas overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Buenos Aires, which is 9:00 AM to 5:00 PM in St. Thomas.
When does the date change in St. Thomas compared with Buenos Aires?
The new day starts in St. Thomas later: until 1:00 AM in Buenos Aires, it is still the previous day there. From 11:00 PM in St. Thomas, Buenos Aires is already on the next day.
Is the time difference between Buenos Aires and St. Thomas the same all year?
No. Only St. Thomas switches to summer time, so the gap changes twice a year. From November 1, 2026, St. Thomas will be 2 hours behind Buenos Aires.
