Greenwich, CT to Buenos Aires: time difference
Buenos Aires is 1 h ahead of Greenwich, CT. 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.
Greenwich, CT 23:18 11:18 PM Buenos Aires 00:18 12:18 AM You –:–
23:18 11:18 PM
Eastern Daylight Time · UTC-4
☀️ 07:10 · 🌙 18:11
00:18 12:18 AM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
·
+1 h
Buenos Aires is 1 h ahead of Greenwich, CT.
When you, Greenwich, CT 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
🇺🇸 Greenwich, CT
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
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Time zones side by side
| Detail | 🇺🇸 Greenwich, CT | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 23:18 | 00:18 |
| Local date | Sunday, October 18, 2026 | Monday, October 19, 2026 |
| Time zone | Eastern Daylight Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Greenwich, CT | — | +1 h |
| IANA zone | America/New York | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:10 | 06:09 |
| Sunset | 18:11 | 19:11 |
| Daylight | 11 h 1 min | 13 h 2 min |
| People on this clock | 62,077 | 2,891,082 |
Compare Greenwich, CT with another city
More comparisons with Greenwich, CT: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Greenwich, CT and Buenos Aires: common questions
What is the time difference between Greenwich, CT, and Buenos Aires?
Buenos Aires is 1 hour ahead: it uses UTC−3, while Greenwich is on UTC−4.
What time is it in Buenos Aires when it is 9:00 AM in Greenwich, CT?
When it is 9:00 AM in Greenwich, it is 10:00 AM in Buenos Aires.
What time is it in Buenos Aires when it is 6:00 PM in Greenwich, CT?
When it is 6:00 PM in Greenwich, it is 7:00 PM in Buenos Aires.
Is there a time when both Greenwich, CT, and Buenos Aires are at work?
Yes: from 9:00 AM to 5:00 PM in Greenwich (10:00 AM to 6:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
When is it already the next day in Buenos Aires?
From 11:00 PM in Greenwich, CT, 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 Greenwich.
Is the time difference between Greenwich, CT, and Buenos Aires the same all year?
No. Only Greenwich switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 2 hours ahead of Greenwich.
