Castro Valley to Sydney time converter

Sydney is 18 hours ahead of Castro Valley. When it is 9:00 AM in Castro Valley, it is 3:00 AM (Tue, Oct 20) in Sydney.

Castro Valley PDT

Monday, October 19, 2026

Sydney AEDT

Monday, October 19, 2026

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

Castro Valley to Sydney conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

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

Distance

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

More conversions

Sydney to Castro ValleyCastro Valley to New YorkCastro Valley to LondonCastro Valley to Los AngelesCastro Valley to ChicagoCastro Valley to TorontoCastro Valley to São PauloCastro Valley to ParisCastro Valley to BerlinCastro Valley to MoscowCastro Valley to DubaiCastro Valley to New DelhiCastro Valley 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 Castro Valley and Sydney?

Sydney is 18 hours ahead of Castro Valley.

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

When it is 9:00 AM in Castro Valley, it is 3:00 AM (Tue, Oct 20) in Sydney.

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

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

Does the time difference between Castro Valley 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.