Morning routines will become much brighter this weekend as daylight saving time ends and everyone turns back their clocks by one hour.
Daylight saving time ends at 2 a.m. on Sunday, when clocks are put on standard time and one hour of daylight is moved from the evening to the morning, according to the National Institute of Standards and Technology in Boulder.
While the U.S. Department of Transportation regulates daylight saving time and time zones, NIST is an official time keeper for the United States.
Daylight saving time begins at 2 a.m. on the second Sunday of March, at which time clocks “spring forward,” and one hour of daylight is moved from the morning to the evening. On the first Sunday of November, time “falls back” and clocks are set back one hour.
In 2007, under the Energy Policy Act of 2005, daylight saving time was extended by about one month in an effort to reduce energy consumption.
Following the change – the first made in more than 20 years – daylight saving time is in place for 238 days of the year.
Daylight saving time was officially introduced in the U.S. in 1918 and most of the country observes the time change. Hawaii, Guam, American Samoa, Puerto Rico, the Virgin Island and the majority of Arizona do not follow daylight saving time.
Jordan Steffen: 303-954-1794 or jsteffen@denverpost.com
