São Paulo to Castro Valley time converter

Castro Valley is 4 hours behind São Paulo. When it is 9:00 AM in São Paulo, it is 5:00 AM in Castro Valley.

São Paulo BRT

Wednesday, October 21, 2026

Castro Valley PDT

Wednesday, October 21, 2026

São Paulo
Brazil
Wed, Oct 21
BRTUTC-3
Castro Valley
California, United States
Wed, Oct 21
PDTUTC-7-4h
Finding your time zone…
Shared working hours (9:00–18:00)

São Paulo to Castro Valley conversion table

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

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

Best time to call or meet

Both sides are at work from 1:00 PM – 6:00 PM in São Paulo (9:00 AM – 2:00 PM in Castro Valley).

Daylight saving time and the difference

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

  • Oct 21, 2026 – Nov 1, 2026: -4h
  • Nov 1, 2026 – Mar 14, 2027: -5h
  • Mar 14, 2027 – Oct 21, 2027: -4h

Distance

São Paulo and Castro Valley are 10,403 km (6,464 miles) apart in a straight line.

More conversions

Castro Valley to São PauloSão Paulo to New YorkSão Paulo to LondonSão Paulo to Los AngelesSão Paulo to ChicagoSão Paulo to TorontoSão Paulo to ParisSão Paulo to BerlinSão Paulo to MoscowSão Paulo to DubaiSão Paulo to New DelhiSão Paulo to BangkokSão Paulo to Singapore
New York to Castro ValleyLondon to Castro ValleyLos Angeles to Castro ValleyChicago to Castro ValleyToronto 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 São Paulo and Castro Valley?

Castro Valley is 4 hours behind São Paulo.

What time is it in Castro Valley when it is 9 AM in São Paulo?

When it is 9:00 AM in São Paulo, it is 5:00 AM in Castro Valley.

When is the best time to call Castro Valley from São Paulo?

Both sides are at work from 1:00 PM – 6:00 PM in São Paulo (9:00 AM – 2:00 PM in Castro Valley).

Does the time difference between São Paulo 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.