Waltham, MA to Buenos Aires: time difference
Buenos Aires is 1 h ahead of Waltham, 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.
Waltham, MA 06:28 6:28 AM Buenos Aires 07:28 7:28 AM You –:–
06:28 6:28 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 18:00
07:28 7:28 AM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
·
+1 h
Buenos Aires is 1 h ahead of Waltham, MA.
When you, Waltham, 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
🇺🇸 Waltham, 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
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Time zones side by side
| Detail | 🇺🇸 Waltham, MA | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 06:28 | 07:28 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Eastern Daylight Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Waltham, 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 | 07:02 | 06:09 |
| Sunset | 18:00 | 19:11 |
| Daylight | 10 h 58 min | 13 h 2 min |
| People on this clock | 60,636 | 2,891,082 |
Compare Waltham, MA with another city
More comparisons with Waltham, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Waltham, MA and Buenos Aires: common questions
How many hours ahead of Waltham, MA, is Buenos Aires?
The clocks in Buenos Aires are 1 hour ahead of those in Waltham (UTC−3 and UTC−4).
If it is 9:00 AM in Waltham, MA, what time is it in Buenos Aires?
At 9:00 AM in Waltham, clocks in Buenos Aires show 10:00 AM.
What time is it in Buenos Aires when it is 6:00 PM in Waltham, MA?
When it is 6:00 PM in Waltham, it is 7:00 PM in Buenos Aires.
When is a good time to call Buenos Aires from Waltham, MA?
Between 9:00 AM and 5:00 PM in Waltham – 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 Waltham, MA?
The new day starts in Buenos Aires earlier: at 11:00 PM in Waltham it is already midnight there. Until 1:00 AM in Buenos Aires, Waltham is still on the previous day.
Does the time gap between Waltham, MA, and Buenos Aires change during the year?
Yes – daylight saving time is used in Waltham but not in Buenos Aires. From November 1, 2026, Buenos Aires will be 2 hours ahead of Waltham.
