Chicago to Castle Rock time converter

Castle Rock is 1 hour behind Chicago. When it is 9:00 AM in Chicago, it is 8:00 AM in Castle Rock.

Chicago CDT

Sunday, October 18, 2026

Castle Rock MDT

Sunday, October 18, 2026

Chicago
Illinois, United States
Sun, Oct 18
CDTUTC-5
Castle Rock
Colorado, United States
Sun, Oct 18
MDTUTC-6-1h
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Castle Rock conversion table

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

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

Best time to call or meet

Both sides are at work from 10:00 AM – 6:00 PM in Chicago (9:00 AM – 5:00 PM in Castle Rock).

Daylight saving time and the difference

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

  • Oct 18, 2026 – Nov 1, 2026: -1h
  • Nov 1, 2026 – Nov 1, 2026: ±0
  • Nov 1, 2026 – Mar 14, 2027: -1h
  • Mar 14, 2027 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Oct 18, 2027: -1h

Distance

Chicago and Castle Rock are 1,476 km (917 miles) apart in a straight line.

More conversions

Castle Rock to ChicagoChicago to New YorkChicago to LondonChicago to Los AngelesChicago to TorontoChicago to São PauloChicago to ParisChicago to BerlinChicago to MoscowChicago to DubaiChicago to New DelhiChicago to BangkokChicago to Singapore
New York to Castle RockLondon to Castle RockLos Angeles 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 RockSingapore to Castle Rock

Questions and answers

What is the time difference between Chicago and Castle Rock?

Castle Rock is 1 hour behind Chicago.

What time is it in Castle Rock when it is 9 AM in Chicago?

When it is 9:00 AM in Chicago, it is 8:00 AM in Castle Rock.

When is the best time to call Castle Rock from Chicago?

Both sides are at work from 10:00 AM – 6:00 PM in Chicago (9:00 AM – 5:00 PM in Castle Rock).

Does the time difference between Chicago 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.