Castle Rock, CO to Sao Paulo: time difference
Sao Paulo is 3 h ahead of Castle Rock, CO. 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.
Castle Rock, CO 12:18 12:18 PM Sao Paulo 15:18 3:18 PM You –:–
12:18 12:18 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
15:18 3:18 PM
Brasilia Standard Time · UTC-3
☀️ 05:39 · 🌙 18:09
·
+3 h
Sao Paulo is 3 h ahead of Castle Rock, CO.
When you, Castle Rock, CO 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
🇺🇸 Castle Rock, 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
🇧🇷 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
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- Early
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Time zones side by side
| Detail | 🇺🇸 Castle Rock, CO | 🇧🇷 Sao Paulo |
|---|---|---|
| Local time | 12:18 | 15:18 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Mountain Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Castle Rock, CO | — | +3 h |
| IANA zone | America/Denver | America/Sao Paulo |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:05 | 05:39 |
| Sunset | 18:29 | 18:09 |
| Daylight | 11 h 25 min | 12 h 31 min |
| People on this clock | 73,158 | 11,451,999 |
Compare Castle Rock, CO with another city
More comparisons with Castle Rock, CO: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Castle Rock, CO and Sao Paulo: common questions
How many hours ahead of Castle Rock, CO, is Sao Paulo?
The clocks in Sao Paulo are 3 hours ahead of those in Castle Rock (UTC−3 and UTC−6).
What time is it in Sao Paulo when it is 9:00 AM in Castle Rock, CO?
When it is 9:00 AM in Castle Rock, it is 12:00 PM in Sao Paulo.
What time is it in Sao Paulo at the end of the working day in Castle Rock, CO?
The working day in Castle Rock ends at 6:00 PM; in Sao Paulo it is 9:00 PM at that moment.
When is a good time to call Sao Paulo from Castle Rock, CO?
Between 9:00 AM and 3:00 PM in Castle Rock – that is 12:00 PM to 6:00 PM in Sao Paulo – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Sao Paulo compared with Castle Rock, CO?
The new day starts in Sao Paulo earlier: at 9:00 PM in Castle Rock it is already midnight there. Until 3:00 AM in Sao Paulo, Castle Rock is still on the previous day.
Does the time gap between Castle Rock, CO, and Sao Paulo change during the year?
Yes – daylight saving time is used in Castle Rock but not in Sao Paulo. From November 1, 2026, Sao Paulo will be 4 hours ahead of Castle Rock.
