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You asked:

When does daylight savings time start in California?

March 10th 2013, 10:00

March 11th 2012, 10:00

When do the clocks go forward (the start of daylight savings time) in California, the most populous state in the United States, and the third largest by land area, after Alaska and Texas; it is also the second most populous sub-national entity in the Americas, behind only São Paulo, Brazil?

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Facts

Show reasoning

I followed this chain of reasoning:

By calculation (generator: ["now@trueknowledge.com"]) I know that:
The current time is February 14th 2012, 23:58:08

I know from locally stored knowledge that:
California is in the Pacific Standard Time region ([fact: ["20031111@trueknowledge.com"]])

By calculation (generator: ["geographically_located_within_or_equal_to@trueknowledge.com"]) I know that:
California is geographically located within or is equal to the Pacific Standard Time region

I know from locally stored knowledge that:
the Pacific Standard Time region is a time zone area ([fact: ["20031039@trueknowledge.com"]])

By calculation (generator: ["time_zone_area_for@trueknowledge.com"]) I know that:
the Pacific Standard Time region is the time zone area for California

I know from locally stored knowledge that:
Fact 1: Pacific Daylight Time is the time zone for the Pacific Standard Time region ([fact: ["20031061@trueknowledge.com"]])

Fact 1 is true for March 11th 2012, 10:00 - November 4th 2012, 09:00 ([fact: ["851850188@trueknowledge.com"]])

Fact 1 is true for March 10th 2013, 10:00 - November 3rd 2013, 09:00 ([fact: ["851850192@trueknowledge.com"]])

daylight saving applies to Pacific Daylight Time ([fact: ["97194005@trueknowledge.com"]])

By calculation (generator: ["start_daylight_saving_time_in7@trueknowledge.com"]) I know that:
March 11th 2012, 10:00 is the start of daylight saving time in California

By calculation (generator: ["timepoint_sum@trueknowledge.com"]) I know that:
March 14th 2013, 23:58:08 is the timepoint sum of February 14th 2012, 23:58:08 and 1 year, 1 month and 0 days

By calculation (generator: ["strictequal1@trueknowledge.com"]) I know that:
February 14th 2012, 23:58:08 - March 14th 2013, 23:58:08 is strictly equal to February 14th 2012, 23:58:08 - March 14th 2013, 23:58:08

By calculation (generator: ["pinstance@trueknowledge.com"]) I know that:
Fact 2: March 11th 2012, 10:00 is a point in time

Fact 2 is true for all time

Fact 2: February 14th 2012, 23:58:08 - March 14th 2013, 23:58:08 is a period of time

Fact 2 is true for all time

By calculation (generator: ["timepointintimeperiod@trueknowledge.com"]) I know that:
March 11th 2012, 10:00 is a timepoint within February 14th 2012, 23:58:08 - March 14th 2013, 23:58:08

By calculation (generator: ["start_daylight_saving_time_in7@trueknowledge.com"]) I know that:
March 10th 2013, 10:00 is the start of daylight saving time in California

By calculation (generator: ["pinstance@trueknowledge.com"]) I know that:
Fact 2: March 10th 2013, 10:00 is a point in time

Fact 2 is true for all time

By calculation (generator: ["timepointintimeperiod@trueknowledge.com"]) I know that:
March 10th 2013, 10:00 is a timepoint within February 14th 2012, 23:58:08 - March 14th 2013, 23:58:08

I used the following facts to provide this answer:

California is or has been in the Pacific Standard Time region

agree disagree edit

the Pacific Standard Time region is a time zone area

agree disagree edit

Pacific Daylight Time has been the time zone for the Pacific Standard Time region between March 11th 2012, 10:00 and November 4th 2012, 09:00

agree disagree edit

Pacific Daylight Time has been the time zone for the Pacific Standard Time region between March 10th 2013, 10:00 and November 3rd 2013, 09:00

agree disagree edit

Pacific Daylight Time is daylight saving

agree disagree edit

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External web pages (using standard web search):

Daylight Saving Time - Saving Time, Saving Energy

... of the staff report, Effects of Daylight Saving Time on California ... of November through February, Daylight Saving Time does not ... compromise was worked out to start DST ...

http://www.energy.ca.gov/daylightsaving.html

Daylight saving time - Wikipedia, the free encyclopedia

Daylight saving time (DST)—also summer ... consumption in California. A 2007 study estimated that winter daylight saving would prevent ... Does daylight saving time save energy? evidence ...

http://en.wikipedia.org/wiki/Daylight_saving_time

When does the daylight saving time start in california? - Yahoo ...

The same time it starts in the rest of the country. (except for AZ and IN, of course)

http://answers.yahoo.com/question/index?qid=1006041321971

Daylight saving time dates for U.S.A. – California – Los ...

Los Angeles, California, United States; Time zone changes and daylight saving time start/end dates between year 2010 and 2019

http://www.timeanddate.com/worldclock/timezone.html?n=137

Daylight saving time by country - Wikipedia, the free encyclopedia

... does not observe Daylight Saving Time, like ... Baja California. Baja California. The state of Baja California has observed daylight saving time from several ... daylight saving time start and ...

http://en.wikipedia.org/wiki/Daylight_saving_time_around_the_world

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