Casper, WY to Sao Paulo: time difference
Sao Paulo is 3 h ahead of Casper, WY. 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.
Casper, WY 12:39 12:39 PM Sao Paulo 15:39 3:39 PM You –:–
12:39 12:39 PM
Mountain Daylight Time · UTC-6
☀️ 07:23 · 🌙 18:19
15:39 3:39 PM
Brasilia Standard Time · UTC-3
☀️ 05:32 · 🌙 18:13
·
+3 h
Sao Paulo is 3 h ahead of Casper, WY.
When you, Casper, WY and Sao Paulo are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Casper, 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
🇧🇷 Sao Paulo
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 | 🇺🇸 Casper, WY | 🇧🇷 Sao Paulo |
|---|---|---|
| Local time | 12:39 | 15:39 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Mountain Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Casper, WY | — | +3 h |
| IANA zone | America/Denver | America/Sao Paulo |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:23 | 05:32 |
| Sunset | 18:19 | 18:13 |
| Daylight | 10 h 57 min | 12 h 41 min |
| People on this clock | 58,763 | 11,451,999 |
Compare Casper, WY with another city
More comparisons with Casper, WY: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Casper, WY and Sao Paulo: common questions
What is the time difference between Casper, WY, and Sao Paulo?
Sao Paulo is 3 hours ahead: it uses UTC−3, while Casper is on UTC−6.
What time is it in Sao Paulo when it is 9:00 AM in Casper, WY?
When it is 9:00 AM in Casper, it is 12:00 PM in Sao Paulo.
If it is 6:00 PM in Casper, WY, what time is it in Sao Paulo?
At 6:00 PM in Casper, clocks in Sao Paulo show 9:00 PM.
When is a good time to call Sao Paulo from Casper, WY?
Between 9:00 AM and 3:00 PM in Casper – that is 12:00 PM to 6:00 PM in Sao Paulo – both places are within working hours (9:00 AM–6:00 PM).
From what time in Casper, WY, is it tomorrow in Sao Paulo?
Once it is 9:00 PM in Casper, the date in Sao Paulo has already changed. Until 3:00 AM in Sao Paulo, it is still the previous day in Casper.
Does the time difference between Casper, WY, and Sao Paulo change?
Yes. The clocks change only in Casper. From November 1, 2026, Sao Paulo will be 4 hours ahead of Casper.
