London to Castro Valley time converter

Castro Valley is 8 hours behind London. When it is 9:00 AM in London, it is 1:00 AM in Castro Valley.

London BST

Tuesday, October 20, 2026

Castro Valley PDT

Tuesday, October 20, 2026

London
United Kingdom
Tue, Oct 20
BSTUTC+1
Castro Valley
California, United States
Tue, Oct 20
PDTUTC-7-8h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Castro Valley conversion table

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

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

Best time to call or meet

Both sides are at work from 5:00 PM – 6:00 PM in London (9:00 AM – 10:00 AM in Castro Valley).

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Mar 28, 2027: -7h
  • Mar 28, 2027 – Oct 20, 2027: -8h

Distance

London and Castro Valley are 8,608 km (5,349 miles) apart in a straight line.

More conversions

Castro Valley to LondonLondon to New YorkLondon to Los AngelesLondon to ChicagoLondon to TorontoLondon to São PauloLondon to ParisLondon to BerlinLondon to MoscowLondon to DubaiLondon to New DelhiLondon to BangkokLondon to Singapore
New York 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 ValleySingapore to Castro Valley

Questions and answers

What is the time difference between London and Castro Valley?

Castro Valley is 8 hours behind London.

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

When it is 9:00 AM in London, it is 1:00 AM in Castro Valley.

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

Both sides are at work from 5:00 PM – 6:00 PM in London (9:00 AM – 10:00 AM in Castro Valley).

Does the time difference between London 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.