Title: Pacific Time Zone
Content:  Through 2006, the local time (PST, UTC−08:00) changed to daylight time (PDT, UTC−07:00) at 02:00 LST (local standard time) to 03:00 LDT (local daylight time) on the first Sunday in April, and returned at 02:00 LDT to 01:00 LST on the last Sunday in October. Effective in the U.S. in 2007 as a result of the Energy Policy Act of 2005, the local time changes from PST to PDT at 02:00 LST to 03:00 LDT on the second Sunday in March and the time returns at 02:00 LDT to 01:00 LST on the first Sunday in November. The Canadian provinces and territories that use daylight time each adopted these dates between October 2005 and February 2007. In Mexico, beginning in 2010, the portion of the country in this time zone uses the extended dates, as do some other parts. The vast majority of Mexico, however, still uses the old dates.
Title: Central Time Zone
Content:  In those areas of the Canadian and American time zones that observe DST, beginning in 2007, the local time changes at 02:00 local standard time to 03:00 local daylight time on the second Sunday in March and returns at 02:00 local daylight time to 01:00 local standard time on the first Sunday in November. Mexico decided not to go along with this change and observes their horario de verano from the first Sunday in April to the last Sunday in October. In December 2009, the Mexican Congress allowed ten border cities, eight of which are in states that observe Central Time, to adopt the U.S. daylight time schedule effective in 2010.
Title: Time in Chile
Content:  feedback from the public about an increase in truancy during the winter months, complaints about older computers and other electronic devices not using the right time zone, and fruit growers reporting a 15% loss in productivity. Starting in 2016, Chile returned to UTC−04:00 for winter time for 3 months. Between 2016 and 2018, this began on the second Sunday of May and ended on the second Sunday of August; from 2019 onward, it will start on the first Sunday of April and end on the first Sunday of September. Since 2017, a new time zone in the Magallanes and Chilean Antarctica region has been implemented, giving two different times in Continental Chile for the first time.
Title: Time in Chile
Content:  and Chilean Antarctica region began to have its own time zone, using summer time (UTC−3) the whole year. Summer time in Chile, also known as daylight saving time (DST) in Chile was used in Chile from 1968 to 2014 & 2016–present. The time zone Chile Summer Time (CLST) was used on the mainland with the offset UTC−03:00 and Easter Island Summer Time (EASST) was used on Easter Island with the offset UTC−05:00. In mainland Chile, time was changed at 24:00 on a Saturday, i.e. at 0:00 on the following Sunday. In Easter Island, time was changed at 20:00 on a Saturday. In 2015, the time offset used in this time zone eventually became the only time zone in Chile. Several exceptions have been decreed to the current rule that began in 1968:
Title: Daylight saving time
Content:  Mountain Time is, for one hour in the autumn, zero hours ahead of Pacific Time instead of the usual one hour ahead, and, for one hour in the spring, it is two hours ahead of Pacific Time instead of one. Also, during the autumn shift from daylight saving to standard time, the hour between 01:00 and 01:59:59 occurs twice in any given time zone, whereas—during the late winter or spring shift from standard to daylight saving time—the hour between 02:00 and 02:59:59 disappears. The dates on which clocks change vary with location and year; consequently, the time differences between regions also vary throughout the year. For example, Central 
Title: Daylight saving time
Content:  year. Moreover, the beginning and ending dates are roughly reversed between the northern and southern hemispheres because spring and autumn are displaced six months. For example, mainland Chile observes DST from the second Saturday in October to the second Saturday in March, with transitions at 24:00 local time. In some countries time is governed by regional jurisdictions within the country such that some jurisdictions change and others do not; this is currently the case in Australia, Canada, Mexico, and the United States (formerly in Brazil, etc.). From year to year, the dates on which to change clock may also move for political or social reasons. The Uniform Time 
Title: Time in Chile
Content:  Time in Chile is divided into three time zones. Most of Continental Chile uses the time offset UTC−04:00 in winter time and UTC−03:00 in summer time, while the Magallanes and Chilean Antarctica region uses the time offset UTC-03:00 the whole year. Additionally, Easter Island uses the time offset UTC−06:00 in winter time and UTC−05:00 in summer time Until 2015, Continental Chile used the time offset UTC−04:00 and Easter Island used UTC−06:00 for standard time, with daylight saving time roughly between October and March every year. In January 2015, the Chilean government announced that the entire country would keep the time offset used during daylight saving time permanently. However, the annual time change was reinstated in 2016 
Title: Winter time (clock lag)
Content:  Until 2015, Continental Chile used the time offset UTC−04:00 and Easter Island used UTC−06:00 for standard time, with daylight saving time roughly between October and March every year. In January 2015 the Chilean government announced that the entire country will keep the time offset used during daylight saving time permanently. Indeed, there was no time change in 2015, however the annual time change was reinstated in 2016 after feedback from the public about an increase in truancy during the winter months, complaints about older computers and other electronic devices not using the right time zone, and fruit growers reporting a 15% loss in productivity. Chile returned to UTC−04:00 for winter time for 3 months starting in 2016. This begins the second Saturday of May and ends on the second Saturday of August. Since 2017 a new time zone in the Magallanes and Chilean Antarctica region has been implemented, having 2 different zones in Continental Chile for the first time.
Title: Daylight saving time in the Americas
Content:  Chile currently observes DST from the first Saturday in September to the first Saturday in April. In the past, DST was observed from the second Saturday in October to the second Saturday in March, but it has varied (see Time in Chile). In 2008, for example, the time was adjusted on Sunday, March 30, at 12 midnight. In 2010, because of an earthquake, DST remained in effect until April 3. In 2011, in order to prevent energy shortages after a dry summer, DST was first extended until April 2 and then until May 7. From 2011-2014, Chile DST started the first Saturday of September at 24:00, and ended the last Saturday of April at 24:00. DST was not observed in 2015 when the government declared that the country would remain on UTC-03:00 permanently. But on March 16, 2016, decree 253 modified the 2015 decision and restored winter time. It would last 90 days from the second weekend of May to the second weekend of August.
Title: Time in Chile
Content:  3 weeks, due to a severe drought ; Due to the 2010 Chile earthquake, daylight saving time ended at 0:00 of 4 April on Continental Chile (20:00 Saturday 3rd on Easter Island) ; In 2011, the government decided to end daylight saving on the first Saturday of April. Later this was postponed to the first Saturday of May. ; On February 15, 2013, DST was extended to the last Sunday of April and started DST on the 2nd Sunday of September. These dates would be nearly the exact dates of North America's DST, reversed to the southern hemisphere, but the DST end date is 1 week early. ; In 2015, the summer time was implemented the whole year. ; In 2016, the change to winter time was restored. ; In 2017, the 

Question: when do they change the time in california?
Answer: Pacific Time Zone.