Buenos Aires to Great Falls, MT: time difference
Great Falls, MT is 3 h behind Buenos Aires. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Buenos Aires 01:07 1:07 AM Great Falls, MT 22:07 10:07 PM You –:–
01:07 1:07 AM
Argentina Standard Time · UTC-3
☀️ 06:18 · 🌙 19:05
22:07 10:07 PM
Mountain Daylight Time · UTC-6
☀️ 07:37 · 🌙 18:48
·
−3 h
Great Falls, MT is 3 h behind Buenos Aires.
When you, Buenos Aires and Great Falls, MT are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
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
🇺🇸 Great Falls, MT
21 9 PM 22 10 PM 23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇺🇸 Great Falls, MT |
|---|---|---|
| Local time | 01:07 | 22:07 |
| Local date | Sunday, October 11, 2026 | Saturday, October 10, 2026 |
| Time zone | Argentina Standard Time | Mountain Daylight Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Buenos Aires | — | −3 h |
| IANA zone | America/Argentina/Buenos Aires | America/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 06:18 | 07:37 |
| Sunset | 19:05 | 18:48 |
| Daylight | 12 h 47 min | 11 h 11 min |
| People on this clock | 2,891,082 | 60,442 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and Great Falls, MT: common questions
How many hours behind Buenos Aires is Great Falls, MT?
The clocks in Great Falls are 3 hours behind those in Buenos Aires (UTC−6 and UTC−3).
If it is 9:00 AM in Buenos Aires, what time is it in Great Falls, MT?
At 9:00 AM in Buenos Aires, clocks in Great Falls show 6:00 AM.
If it is 6:00 PM in Buenos Aires, what time is it in Great Falls, MT?
At 6:00 PM in Buenos Aires, clocks in Great Falls show 3:00 PM.
Is there a time when both Buenos Aires and Great Falls, MT, are at work?
Yes: from 12:00 PM to 6:00 PM in Buenos Aires (9:00 AM to 3:00 PM in Great Falls), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Buenos Aires is it still yesterday in Great Falls, MT?
Before 3:00 AM in Buenos Aires, the date in Great Falls has not changed yet. From 9:00 PM in Great Falls, it is already the next day in Buenos Aires.
Does the time difference between Buenos Aires and Great Falls, MT, change?
Yes. The clocks change only in Great Falls. From November 1, 2026, Great Falls will be 4 hours behind Buenos Aires.
