Boston, MA to Buenos Aires: time difference
Buenos Aires is 1 h ahead of Boston, MA. 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.
Boston, MA 20:25 8:25 PM Buenos Aires 21:25 9:25 PM You –:–
20:25 8:25 PM
Eastern Daylight Time · UTC-4
☀️ 06:51 · 🌙 18:14
21:25 9:25 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
+1 h
Buenos Aires is 1 h ahead of Boston, MA.
When you, Boston, MA 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
🇺🇸 Boston, MA
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 | 🇺🇸 Boston, MA | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 20:25 | 21:25 |
| Local date | Friday, October 9, 2026 | Friday, October 9, 2026 |
| Time zone | Eastern Daylight Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Boston, MA | — | +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 | 06:51 | 06:20 |
| Sunset | 18:14 | 19:03 |
| Daylight | 11 h 23 min | 12 h 43 min |
| People on this clock | 675,647 | 2,891,082 |
Compare Boston, MA with another city
More comparisons with Boston, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Boston, MA and Buenos Aires: common questions
How many hours ahead of Boston, MA, is Buenos Aires?
The clocks in Buenos Aires are 1 hour ahead of those in Boston (UTC−3 and UTC−4).
What time is it in Buenos Aires at the start of the working day in Boston, MA?
The working day in Boston starts at 9:00 AM; in Buenos Aires it is 10:00 AM at that moment.
What time is it in Buenos Aires when it is 6:00 PM in Boston, MA?
When it is 6:00 PM in Boston, it is 7:00 PM in Buenos Aires.
When is a good time to call Buenos Aires from Boston, MA?
Between 9:00 AM and 5:00 PM in Boston – that is 10:00 AM to 6:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Buenos Aires compared with Boston, MA?
The new day starts in Buenos Aires earlier: at 11:00 PM in Boston it is already midnight there. Until 1:00 AM in Buenos Aires, Boston is still on the previous day.
Is the time difference between Boston, MA, and Buenos Aires the same all year?
No. Only Boston switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 2 hours ahead of Boston.
