Rio de Janeiro to Castle Rock time converter

Castle Rock is 3 hours behind Rio de Janeiro. When it is 9:00 AM in Rio de Janeiro, it is 6:00 AM in Castle Rock.

Rio de Janeiro BRT

Wednesday, October 21, 2026

Castle Rock MDT

Wednesday, October 21, 2026

Rio de Janeiro
Brazil
Wed, Oct 21
BRTUTC-3
Castle Rock
Colorado, United States
Wed, Oct 21
MDTUTC-6-3h
Finding your time zone…
Shared working hours (9:00–18:00)

Rio de Janeiro to Castle Rock conversion table

Every hour of today in Rio de Janeiro and the matching time in Castle Rock. Light rows are typical working hours (9:00–18:00).

Rio de JaneiroCastle Rock
12:00 AM9:00 PM−1 day
1:00 AM10:00 PM−1 day
2:00 AM11:00 PM−1 day
3:00 AM12:00 AM
4:00 AM1:00 AM
5:00 AM2:00 AM
6:00 AM3:00 AM
7:00 AM4:00 AM
8:00 AM5:00 AM
9:00 AM6:00 AM
10:00 AM7:00 AM
11:00 AM8:00 AM
12:00 PM9:00 AM
1:00 PM10:00 AM
2:00 PM11:00 AM
3:00 PM12:00 PM
4:00 PM1:00 PM
5:00 PM2:00 PM
6:00 PM3:00 PM
7:00 PM4:00 PM
8:00 PM5:00 PM
9:00 PM6:00 PM
10:00 PM7:00 PM
11:00 PM8:00 PM

Best time to call or meet

Both sides are at work from 12:00 PM – 6:00 PM in Rio de Janeiro (9:00 AM – 3:00 PM in Castle Rock).

Daylight saving time and the difference

The difference changes during the year because Rio de Janeiro and Castle Rock switch clocks on different dates:

  • Oct 21, 2026 – Nov 1, 2026: -3h
  • Nov 1, 2026 – Mar 14, 2027: -4h
  • Mar 14, 2027 – Oct 21, 2027: -3h

Distance

Rio de Janeiro and Castle Rock are 9,427 km (5,858 miles) apart in a straight line.

More conversions

Castle Rock to Rio de JaneiroRio de Janeiro to New YorkRio de Janeiro to LondonRio de Janeiro to Los AngelesRio de Janeiro to ChicagoRio de Janeiro to TorontoRio de Janeiro to São PauloRio de Janeiro to ParisRio de Janeiro to BerlinRio de Janeiro to MoscowRio de Janeiro to DubaiRio de Janeiro to New DelhiRio de Janeiro to Bangkok
New York to Castle RockLondon to Castle RockLos Angeles to Castle RockChicago to Castle RockToronto to Castle RockSão Paulo to Castle RockParis to Castle RockBerlin to Castle RockMoscow to Castle RockDubai to Castle RockNew Delhi to Castle RockBangkok to Castle Rock

Questions and answers

What is the time difference between Rio de Janeiro and Castle Rock?

Castle Rock is 3 hours behind Rio de Janeiro.

What time is it in Castle Rock when it is 9 AM in Rio de Janeiro?

When it is 9:00 AM in Rio de Janeiro, it is 6:00 AM in Castle Rock.

When is the best time to call Castle Rock from Rio de Janeiro?

Both sides are at work from 12:00 PM – 6:00 PM in Rio de Janeiro (9:00 AM – 3:00 PM in Castle Rock).

Does the time difference between Rio de Janeiro and Castle Rock change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.