Castries to Buenos Aires: time difference
Buenos Aires is 1 h ahead of Castries. Live clocks for both, the working hours they share, and how each one sits against your own time.
+1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Castries 23:18 11:18 PM Buenos Aires 00:18 12:18 AM You –:–
23:18 11:18 PM
Atlantic Standard Time · UTC-4
☀️ 05:55 · 🌙 17:49
00:18 12:18 AM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
+1 h
Buenos Aires is 1 h ahead of Castries.
When you, Castries 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
🇱🇨 Castries
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 | 🇱🇨 Castries | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 23:18 | 00:18 |
| Local date | Friday, October 9, 2026 | Saturday, October 10, 2026 |
| Time zone | Atlantic Standard Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Castries | — | +1 h |
| IANA zone | America/St Lucia | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:55 | 06:20 |
| Sunset | 17:49 | 19:03 |
| Daylight | 11 h 54 min | 12 h 43 min |
| People on this clock | 22,000 | 2,891,082 |
Compare Castries with another city
More comparisons with Castries: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Castries and Buenos Aires: common questions
How many hours ahead of Castries is Buenos Aires?
The clocks in Buenos Aires are 1 hour ahead of those in Castries (UTC−3 and UTC−4).
If it is 9:00 AM in Castries, what time is it in Buenos Aires?
At 9:00 AM in Castries, clocks in Buenos Aires show 10:00 AM.
What time is it in Buenos Aires when it is 6:00 PM in Castries?
When it is 6:00 PM in Castries, it is 7:00 PM in Buenos Aires.
When do working hours in Castries and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Castries, which is 10:00 AM to 6:00 PM in Buenos Aires.
When is it already the next day in Buenos Aires?
From 11:00 PM in Castries it is already the next day in Buenos Aires. The other way round, until 1:00 AM in Buenos Aires it is still the previous day in Castries.
Does the time difference between Castries and Buenos Aires change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
