Buenos Aires to Thornton, CO: time difference
Thornton, CO 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 15:39 3:39 PM Thornton, CO 12:39 12:39 PM You –:–
15:39 3:39 PM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
12:39 12:39 PM
Mountain Daylight Time · UTC-6
☀️ 07:14 · 🌙 18:17
·
−3 h
Thornton, CO is 3 h behind Buenos Aires.
When you, Buenos Aires and Thornton, CO 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
🇺🇸 Thornton, CO
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 | 🇺🇸 Thornton, CO |
|---|---|---|
| Local time | 15:39 | 12:39 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 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 | 06:09 | 07:14 |
| Sunset | 19:11 | 18:17 |
| Daylight | 13 h 2 min | 11 h 3 min |
| People on this clock | 2,891,082 | 139,478 |
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 Thornton, CO: common questions
How far behind Buenos Aires is Thornton, CO?
Thornton is 3 hours behind Buenos Aires: UTC−6 against UTC−3.
If it is 9:00 AM in Buenos Aires, what time is it in Thornton, CO?
At 9:00 AM in Buenos Aires, clocks in Thornton show 6:00 AM.
If it is 6:00 PM in Buenos Aires, what time is it in Thornton, CO?
At 6:00 PM in Buenos Aires, clocks in Thornton show 3:00 PM.
Is there a time when both Buenos Aires and Thornton, CO, are at work?
Yes: from 12:00 PM to 6:00 PM in Buenos Aires (9:00 AM to 3:00 PM in Thornton), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Thornton, CO, compared with Buenos Aires?
The new day starts in Thornton later: until 3:00 AM in Buenos Aires, it is still the previous day there. From 9:00 PM in Thornton, Buenos Aires is already on the next day.
Does the time difference between Buenos Aires and Thornton, CO, change?
Yes. The clocks change only in Thornton. From November 1, 2026, Thornton will be 4 hours behind Buenos Aires.
