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 11:42 11:42 AM St Thomas 10:42 10:42 AM You –:–
11:42 11:42 AM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
10:42 10:42 AM
Atlantic Standard Time · UTC-4
☀️ 06:15 · 🌙 17:57
·
−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 | 11:42 | 10:42 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Argentina Standard Time | Atlantic Standard Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Buenos Aires | — | −1 h |
| IANA zone | America/Argentina/Buenos Aires | America/St Thomas |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:10 | 06:15 |
| Sunset | 19:10 | 17:57 |
| Daylight | 13 h | 11 h 42 min |
| People on this clock | 2,891,082 | 20,000 |
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.
If it is 9:00 AM in Buenos Aires, what time is it in St Thomas?
At 9:00 AM in Buenos Aires, clocks in St Thomas show 8:00 AM.
If it is 6:00 PM in Buenos Aires, what time is it in St Thomas?
At 6:00 PM in Buenos Aires, clocks in St Thomas show 5:00 PM.
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 is it still the previous day in St Thomas?
Until 1:00 AM in Buenos Aires it is still the previous day in St Thomas. The other way round, from 11:00 PM in St Thomas it is already the next day in Buenos Aires.
Is the time difference between Buenos Aires and St Thomas the same all year?
Yes. Neither Buenos Aires nor St Thomas switches to summer time, so the gap is always 1 hour.
