Sydney to Castle Rock time converter

Castle Rock is 17 hours behind Sydney. When it is 9:00 AM in Sydney, it is 4:00 PM (Sun, Oct 18) in Castle Rock.

Sydney AEDT

Monday, October 19, 2026

Castle Rock MDT

Monday, October 19, 2026

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

Sydney to Castle Rock conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 19, 2026 – Nov 1, 2026: -17h
  • Nov 1, 2026 – Mar 14, 2027: -18h
  • Mar 14, 2027 – Apr 4, 2027: -17h
  • Apr 4, 2027 – Oct 3, 2027: -16h
  • Oct 3, 2027 – Oct 19, 2027: -17h

Distance

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

More conversions

Castle Rock to SydneySydney to New YorkSydney to LondonSydney to Los AngelesSydney to ChicagoSydney to TorontoSydney to São PauloSydney to ParisSydney to BerlinSydney to MoscowSydney to DubaiSydney to New DelhiSydney 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 Sydney and Castle Rock?

Castle Rock is 17 hours behind Sydney.

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

When it is 9:00 AM in Sydney, it is 4:00 PM (Sun, Oct 18) in Castle Rock.

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

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

Does the time difference between Sydney 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.