Time in Santa Rosa, California, USA

09:32 PM
Sunday, October 21, 2018

Santa Rosa time zone: UTC-07:00 or PDT
Daylight saving time is in effect in Santa Rosa.
See recent and expected DST changes in Santa Rosa in the table below.

Daylight saving time (DST) changes in Santa Rosa

The next DST change is highlighted.

Change Type	Status	Time and Date of DST Change	Time Change
DST began	Past	Sunday, March 11, 2018 at 2:00Sunday, March 11, 2018 at 2:00 AM	The clocks were put forward an hour.
DST ends	Expected	Sunday, November 4, 2018 at 2:00Sunday, November 4, 2018 at 2:00 AM	The clocks will be put back an hour.
DST begins	Expected	Sunday, March 10, 2019 at 2:00Sunday, March 10, 2019 at 2:00 AM	The clocks will be put forward an hour.

Sunrise and sunset time for Santa Rosa

Sunrise: 7:26 AM
Sunset: 6:23 PM
Day length: 10h 56m 45s
Solar noon: 12:55 PM
See the monthly sunrise, sunset, and twilight table for Santa Rosa

Santa Rosa weather

Freemeteo.com: Santa Rosa weather

Santa Rosa, USA: basic facts and figures

Country: USA
State: California
Santa Rosa coordinates: 38°26′25″ N, 122°42′51″ W
Population: 167,815
Wikipedia article: Santa Rosa

The length of a solar day is determined by the time that it takes for the Earth to complete a full rotation around its axis and equals 24 hours. The Earth’s rotation on its axis leads to change between day and night. Another consequence of this rotation is the fact that while moving by 15° from West to East local solar time increases by an hour.
In everyday life people use official local time which almost always differs from solar time. All of the Earth’s surface is divided into time zones. All places within the same time zone observe the same time. Time zone boundaries usually follow country or administrative borders. Time difference between adjacent time zones normally equals one hour, though sometimes time in neighbouring time zones may differ by two or more hours. There are also cases when adjacent time zone difference equals 30 or 45 minutes.
For most countries the entire country’s territory lies within the same time zone. Countries whose territory stretches from West to East by a significant distance, such as Russia, USA, Canada, Brazil and some others, are usually divided into a few time zones. One notable exception is China where Beijing time serves as the official time all over the country.
Coordinated Universal Time or UTC is the reference point to determine time zone offsets. UTC corresponds to mean solar time on the Prime or Greenwich Meridian (0° longitude). Time zone offsets from UTC range from UTC-12:00 to UTC+14:00.
Almost all countries in Europe and North America as well as many other countries observe Daylight Saving Time (DST) and put their clocks an hour forward in the spring and an hour back in the autumn. In these countries time zone offsets from UTC change twice a year. Most countries do not observe DST though.

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