Sao Paulo to Castle Rock, CO: time difference
Castle Rock, CO is 3 h behind Sao Paulo. 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.
Sao Paulo 16:01 4:01 PM Castle Rock, CO 13:01 1:01 PM You –:–
16:01 4:01 PM
Brasilia Standard Time · UTC-3
☀️ 05:39 · 🌙 18:09
13:01 1:01 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
·
−3 h
Castle Rock, CO is 3 h behind Sao Paulo.
When you, Sao Paulo and Castle Rock, 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
🇧🇷 Sao Paulo
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
🇺🇸 Castle Rock, 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 | 🇧🇷 Sao Paulo | 🇺🇸 Castle Rock, CO |
|---|---|---|
| Local time | 16:01 | 13:01 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Brasilia Standard Time | Mountain Daylight Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Sao Paulo | — | −3 h |
| IANA zone | America/Sao Paulo | America/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 05:39 | 07:05 |
| Sunset | 18:09 | 18:29 |
| Daylight | 12 h 31 min | 11 h 25 min |
| People on this clock | 11,451,999 | 73,158 |
Compare Sao Paulo with another city
More comparisons with Sao Paulo: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Sao Paulo and Castle Rock, CO: common questions
How many hours behind Sao Paulo is Castle Rock, CO?
The clocks in Castle Rock are 3 hours behind those in Sao Paulo (UTC−6 and UTC−3).
If it is 9:00 AM in Sao Paulo, what time is it in Castle Rock, CO?
At 9:00 AM in Sao Paulo, clocks in Castle Rock show 6:00 AM.
What time is it in Castle Rock, CO, when it is 6:00 PM in Sao Paulo?
When it is 6:00 PM in Sao Paulo, it is 3:00 PM in Castle Rock.
When do working hours in Sao Paulo and in Castle Rock, CO, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 12:00 PM to 6:00 PM in Sao Paulo, which is 9:00 AM to 3:00 PM in Castle Rock.
Until what time in Sao Paulo is it still yesterday in Castle Rock, CO?
Before 3:00 AM in Sao Paulo, the date in Castle Rock has not changed yet. From 9:00 PM in Castle Rock, it is already the next day in Sao Paulo.
Does the time difference between Sao Paulo and Castle Rock, CO, change?
Yes. The clocks change only in Castle Rock. From November 1, 2026, Castle Rock will be 4 hours behind Sao Paulo.
