Thornton, CO to Buenos Aires: time difference
Buenos Aires is 3 h ahead of Thornton, CO. 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.
Thornton, CO 12:31 12:31 PM Buenos Aires 15:31 3:31 PM You –:–
12:31 12:31 PM
Mountain Daylight Time · UTC-6
☀️ 07:14 · 🌙 18:17
15:31 3:31 PM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
·
+3 h
Buenos Aires is 3 h ahead of Thornton, CO.
When you, Thornton, CO 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
🇺🇸 Thornton, CO
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
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Time zones side by side
| Detail | 🇺🇸 Thornton, CO | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 12:31 | 15:31 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Mountain Daylight Time | Argentina Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Thornton, CO | — | +3 h |
| IANA zone | America/Denver | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:14 | 06:09 |
| Sunset | 18:17 | 19:11 |
| Daylight | 11 h 3 min | 13 h 2 min |
| People on this clock | 139,478 | 2,891,082 |
Compare Thornton, CO with another city
More comparisons with Thornton, CO: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Thornton, CO and Buenos Aires: common questions
What is the time difference between Thornton, CO, and Buenos Aires?
Buenos Aires is 3 hours ahead: it uses UTC−3, while Thornton is on UTC−6.
If it is 9:00 AM in Thornton, CO, what time is it in Buenos Aires?
At 9:00 AM in Thornton, clocks in Buenos Aires show 12:00 PM.
What time is it in Buenos Aires when it is 6:00 PM in Thornton, CO?
When it is 6:00 PM in Thornton, it is 9:00 PM in Buenos Aires.
Is there a time when both Thornton, CO, and Buenos Aires are at work?
Yes: from 9:00 AM to 3:00 PM in Thornton (12:00 PM to 6:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Buenos Aires compared with Thornton, CO?
The new day starts in Buenos Aires earlier: at 9:00 PM in Thornton it is already midnight there. Until 3:00 AM in Buenos Aires, Thornton is still on the previous day.
Does the time difference between Thornton, CO, and Buenos Aires change?
Yes. The clocks change only in Thornton. From November 1, 2026, Buenos Aires will be 4 hours ahead of Thornton.
