Sydney to Castro Valley time converter

Castro Valley is 18 hours behind Sydney. When it is 9:00 AM in Sydney, it is 3:00 PM (Mon, Oct 19) in Castro Valley.

Sydney AEDT

Tuesday, October 20, 2026

Castro Valley PDT

Monday, October 19, 2026

Sydney
New South Wales, Australia
Tue, Oct 20
AEDTUTC+11
Castro Valley
California, United States
Mon, Oct 19
PDTUTC-7-18h
Finding your time zone…
Shared working hours (9:00–18:00)

Sydney to Castro Valley conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 12:00 PM in Sydney (3:00 PM – 6:00 PM in Castro Valley).

Daylight saving time and the difference

The difference changes during the year because Sydney and Castro Valley switch clocks on different dates:

  • Oct 20, 2026 – Nov 1, 2026: -18h
  • Nov 1, 2026 – Mar 14, 2027: -19h
  • Mar 14, 2027 – Apr 4, 2027: -18h
  • Apr 4, 2027 – Oct 3, 2027: -17h
  • Oct 3, 2027 – Oct 20, 2027: -18h

Distance

Sydney and Castro Valley are 11,969 km (7,437 miles) apart in a straight line.

More conversions

Castro Valley 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 Castro ValleyLondon to Castro ValleyLos Angeles to Castro ValleyChicago to Castro ValleyToronto to Castro ValleySão Paulo to Castro ValleyParis to Castro ValleyBerlin to Castro ValleyMoscow to Castro ValleyDubai to Castro ValleyNew Delhi to Castro ValleyBangkok to Castro Valley

Questions and answers

What is the time difference between Sydney and Castro Valley?

Castro Valley is 18 hours behind Sydney.

What time is it in Castro Valley when it is 9 AM in Sydney?

When it is 9:00 AM in Sydney, it is 3:00 PM (Mon, Oct 19) in Castro Valley.

When is the best time to call Castro Valley from Sydney?

Both sides are at work from 9:00 AM – 12:00 PM in Sydney (3:00 PM – 6:00 PM in Castro Valley).

Does the time difference between Sydney and Castro Valley change?

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