St Thomas to Buenos Aires: time difference
Buenos Aires is 1 h ahead of St Thomas. 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.
St Thomas 09:39 9:39 AM Buenos Aires 10:39 10:39 AM You –:–
09:39 9:39 AM
Atlantic Standard Time · UTC-4
☀️ 06:15 · 🌙 17:57
10:39 10:39 AM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
·
+1 h
Buenos Aires is 1 h ahead of St Thomas.
When you, St Thomas and Buenos Aires are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇻🇮 St Thomas
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
🇦🇷 Buenos Aires
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇻🇮 St Thomas | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 09:39 | 10:39 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Atlantic Standard Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from St Thomas | — | +1 h |
| IANA zone | America/St Thomas | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:15 | 06:10 |
| Sunset | 17:57 | 19:10 |
| Daylight | 11 h 42 min | 13 h |
| People on this clock | 20,000 | 2,891,082 |
Compare St Thomas with another city
More comparisons with St Thomas: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
St Thomas and Buenos Aires: common questions
How many hours ahead of St Thomas is Buenos Aires?
The clocks in Buenos Aires are 1 hour ahead of those in St Thomas (UTC−3 and UTC−4).
If it is 9:00 AM in St Thomas, what time is it in Buenos Aires?
At 9:00 AM in St Thomas, clocks in Buenos Aires show 10:00 AM.
What time is it in Buenos Aires at the end of the working day in St Thomas?
The working day in St Thomas ends at 6:00 PM; in Buenos Aires it is 7:00 PM at that moment.
When do working hours in St Thomas and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in St Thomas, which is 10:00 AM to 6:00 PM in Buenos Aires.
From what time in St Thomas is it tomorrow in Buenos Aires?
Once it is 11:00 PM in St Thomas, the date in Buenos Aires has already changed. Until 1:00 AM in Buenos Aires, it is still the previous day in St Thomas.
Does the time difference between St Thomas and Buenos Aires change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
