Monterrey to Buenos Aires: time difference
Buenos Aires is 3 h ahead of Monterrey. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Monterrey 21:20 9:20 PM Buenos Aires 00:20 12:20 AM You –:–
21:20 9:20 PM
Central Standard Time · UTC-6
☀️ 06:38 · 🌙 18:21
00:20 12:20 AM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
+3 h
Buenos Aires is 3 h ahead of Monterrey.
When you, Monterrey 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
🇲🇽 Monterrey
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
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 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇲🇽 Monterrey | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 21:20 | 00:20 |
| Local date | Friday, October 9, 2026 | Saturday, October 10, 2026 |
| Time zone | Central Standard Time | Argentina Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Monterrey | — | +3 h |
| IANA zone | America/Monterrey | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:38 | 06:20 |
| Sunset | 18:21 | 19:03 |
| Daylight | 11 h 43 min | 12 h 43 min |
| People on this clock | 1,142,994 | 2,891,082 |
Compare Monterrey with another city
More comparisons with Monterrey: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Monterrey and Buenos Aires: common questions
How many hours ahead of Monterrey is Buenos Aires?
The clocks in Buenos Aires are 3 hours ahead of those in Monterrey (UTC−3 and UTC−6).
What time is it in Buenos Aires when it is 9:00 AM in Monterrey?
When it is 9:00 AM in Monterrey, it is 12:00 PM in Buenos Aires.
What time is it in Buenos Aires when it is 6:00 PM in Monterrey?
When it is 6:00 PM in Monterrey, it is 9:00 PM in Buenos Aires.
When is a good time to call Buenos Aires from Monterrey?
Between 9:00 AM and 3:00 PM in Monterrey – that is 12:00 PM to 6:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Buenos Aires?
From 9:00 PM in Monterrey it is already the next day in Buenos Aires. The other way round, until 3:00 AM in Buenos Aires it is still the previous day in Monterrey.
Is the time difference between Monterrey and Buenos Aires the same all year?
Yes. Neither Monterrey nor Buenos Aires switches to summer time, so the gap is always 3 hours.
