Cheyenne, WY to Buenos Aires: time difference
Buenos Aires is 3 h ahead of Cheyenne, WY. 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.
Cheyenne, WY 20:12 8:12 PM Buenos Aires 23:12 11:12 PM You –:–
20:12 8:12 PM
Mountain Daylight Time · UTC-6
☀️ 07:18 · 🌙 18:11
23:12 11:12 PM
Argentina Standard Time · UTC-3
☀️ 06:05 · 🌙 19:13
·
+3 h
Buenos Aires is 3 h ahead of Cheyenne, WY.
When you, Cheyenne, WY 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
🇺🇸 Cheyenne, WY
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
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Time zones side by side
| Detail | 🇺🇸 Cheyenne, WY | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 20:12 | 23:12 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Mountain Daylight Time | Argentina Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Cheyenne, WY | — | +3 h |
| IANA zone | America/Denver | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:18 | 06:05 |
| Sunset | 18:11 | 19:13 |
| Daylight | 10 h 53 min | 13 h 8 min |
| People on this clock | 65,035 | 2,891,082 |
Compare Cheyenne, WY with another city
More comparisons with Cheyenne, WY: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Cheyenne, WY and Buenos Aires: common questions
How far ahead of Cheyenne, WY, is Buenos Aires?
Buenos Aires is 3 hours ahead of Cheyenne: UTC−3 against UTC−6.
What time is it in Buenos Aires when it is 9:00 AM in Cheyenne, WY?
When it is 9:00 AM in Cheyenne, it is 12:00 PM in Buenos Aires.
What time is it in Buenos Aires at the end of the working day in Cheyenne, WY?
The working day in Cheyenne ends at 6:00 PM; in Buenos Aires it is 9:00 PM at that moment.
When is a good time to call Buenos Aires from Cheyenne, WY?
Between 9:00 AM and 3:00 PM in Cheyenne – 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 does the date change in Buenos Aires compared with Cheyenne, WY?
The new day starts in Buenos Aires earlier: at 9:00 PM in Cheyenne it is already midnight there. Until 3:00 AM in Buenos Aires, Cheyenne is still on the previous day.
Is the time difference between Cheyenne, WY, and Buenos Aires the same all year?
No. Only Cheyenne switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 4 hours ahead of Cheyenne.
