Castle Rock to Sydney time converter

Sydney is 17 hours ahead of Castle Rock. When it is 9:00 AM in Castle Rock, it is 2:00 AM (Tue, Oct 20) in Sydney.

Castle Rock MDT

Monday, October 19, 2026

Sydney AEDT

Monday, October 19, 2026

Castle Rock
Colorado, United States
Mon, Oct 19
MDTUTC-6
Sydney
New South Wales, Australia
Mon, Oct 19
AEDTUTC+11+17h
Finding your time zone…
Shared working hours (9:00–18:00)

Castle Rock to Sydney conversion table

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

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

Best time to call or meet

Both sides are at work from 4:00 PM – 6:00 PM in Castle Rock (9:00 AM – 11:00 AM in Sydney).

Daylight saving time and the difference

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

  • Oct 19, 2026 – Nov 1, 2026: +17h
  • Nov 1, 2026 – Mar 14, 2027: +18h
  • Mar 14, 2027 – Apr 3, 2027: +17h
  • Apr 3, 2027 – Oct 2, 2027: +16h
  • Oct 2, 2027 – Oct 19, 2027: +17h

Distance

Castle Rock and Sydney are 13,403 km (8,328 miles) apart in a straight line.

More conversions

Sydney 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 SydneyLondon to SydneyLos Angeles to SydneyChicago to SydneyToronto to SydneySão Paulo to SydneyParis to SydneyBerlin to SydneyMoscow to SydneyDubai to SydneyNew Delhi to SydneyBangkok to Sydney

Questions and answers

What is the time difference between Castle Rock and Sydney?

Sydney is 17 hours ahead of Castle Rock.

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

When it is 9:00 AM in Castle Rock, it is 2:00 AM (Tue, Oct 20) in Sydney.

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

Both sides are at work from 4:00 PM – 6:00 PM in Castle Rock (9:00 AM – 11:00 AM in Sydney).

Does the time difference between Castle Rock and Sydney change?

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