What is the ISO week number in Castro Valley?

TimeDials shows the current ISO week number for Castro Valley in real time. ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year.

Does Castro Valley observe daylight saving time (DST)?

Yes, Castro Valley observes daylight saving time. The next clock change is on 2026-11-01 (clocks move back to GMT-8).

Time in Castro Valley, California, United States — Local Time & Date

Live

--:--:--

Current local time in 🇺🇸 Castro Valley, California, United States.

PST/PDT UTC-07:00

Relative to You

Detecting your timezone…

Relative to UTC

-7 hours behind

Noon here = 19:00 UTC

09:00 here = 16:00 UTC

12:00 here = 19:00 UTC

17:00 here = 00:00 UTC

ISO Week

11 Odd Week

Sun

07:21

18:56

Today

The small hours in Castro Valley. The city sleeps before dawn. The current offset is UTC-07:00.

Daylight Saving Time

Last Clock Change

2026-03-08

Clocks moved forward to GMT-7

Next Clock Change

2026-11-01

Clocks will move back to GMT-8

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Quick Facts

Country	🇺🇸United States
State / Region	California
Timezone	PST/PDT
UTC Offset	UTC-07:00
DST	Yes — daylight saving time observed
Population	61,388
Elevation	49 m
Sunrise	07:21
Sunset	18:56
Coordinates	37.69°N, -122.09°E

Map

Map data © OpenStreetMap contributors

Time Difference to Major Cities

City	Difference	Local Time
New York	+3h	--:--
London	+7h	--:--
Paris	+8h	--:--
Dubai	+11h	--:--
Mumbai	+12h 30m	--:--
Singapore	+15h	--:--
Tokyo	+16h	--:--
Sydney	+18h	--:--
Sao Paulo	+4h	--:--
Cairo	+9h	--:--
Shanghai	+15h	--:--

Frequently Asked Questions

What are the business hours in Castro Valley?

Standard business hours in Castro Valley are 09:00–17:00 local time (PST/PDT). Check the live clock above to see the current local time. Use our Time Zone Planner to find the best meeting time across cities.

What is the UTC offset for Castro Valley?

Castro Valley is currently at UTC-07:00. The timezone identifier is PST/PDT. When it is noon in Castro Valley, it is 19:00 UTC. You can embed a live Castro Valley clock on your website.

What ISO week number is it in Castro Valley?

It is currently ISO week 11 (odd week) in Castro Valley. ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year. Learn more about ISO week numbers.

Does Castro Valley observe daylight saving time?

Yes, Castro Valley observes daylight saving time (DST). The most recent change was on 2026-03-08, when clocks moved forward to GMT-7. The next change is on 2026-11-01, when clocks will move back to GMT-8.