Castle Rock to Rio de Janeiro time converter

Rio de Janeiro is 3 hours ahead of Castle Rock. When it is 9:00 AM in Castle Rock, it is 12:00 PM in Rio de Janeiro.

Castle Rock MDT

Wednesday, October 21, 2026

Rio de Janeiro BRT

Wednesday, October 21, 2026

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

Castle Rock to Rio de Janeiro conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

The difference changes during the year because Castle Rock and Rio de Janeiro 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

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

More conversions

Rio de Janeiro to Castle RockCastle Rock to New YorkCastle Rock to LondonCastle Rock to Los AngelesCastle Rock to ChicagoCastle Rock to TorontoCastle Rock to São PauloCastle Rock to ParisCastle Rock to BerlinCastle Rock to MoscowCastle Rock to DubaiCastle Rock to New DelhiCastle Rock to Bangkok
New York to Rio de JaneiroLondon to Rio de JaneiroLos Angeles to Rio de JaneiroChicago to Rio de JaneiroToronto to Rio de JaneiroSão Paulo to Rio de JaneiroParis to Rio de JaneiroBerlin to Rio de JaneiroMoscow to Rio de JaneiroDubai to Rio de JaneiroNew Delhi to Rio de JaneiroBangkok to Rio de Janeiro

Questions and answers

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

Rio de Janeiro is 3 hours ahead of Castle Rock.

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

When it is 9:00 AM in Castle Rock, it is 12:00 PM in Rio de Janeiro.

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

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

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

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