In the United States and Canada, clocks will turn backward one hour on Nov. 6 when the local daylight time is about to reach 2 a.m. to signal the end of Daylight Saving Time (DST). This will also signal the beginning of winter, a clear indication that darker days are ahead.
DST is about to complete its 238 days run or 65 percent of the total year, as provided for in the Energy Policy Act of 2005 that aims to reduce energy consumption. The rules applying to the implementation of DST changed in 2007 which extended the practice for another month. Most of United States and its territories practice DST except for American Samoa, Guam, Hawaii, Perto Rico, the Virgin Islands, and the state of Arizona.
The United Kingdom reverted to Greenwich Mean Time (GMT) at 2 a.m. last Sunday, Oct. 30. It means that clocks were turned back to 1 a.m. at that time.
Citizens are strongly advised to prepare and make sure to adjust their clocks lest they want to be late in the next day's appointments.
To better understand how DST works and when to begin and end it, people are advised to memorize the phrase "spring forward, fall back." It simply means that clocks go forward an hour on the last weekend of March during spring and an hour backward when fall comes to an end.
DST, also known as "summer time" in many places, was introduced so people, communities, and industries can make better use of daylight by advancing clocks by an hour. In effect, sunrise is delayed by an hour as well. DST usually begins on the last Sunday of March and ends on the last Sunday of October. In countries comprising the European Union (EU), all time zones change their clocks at the same time.
It was invented by a New Zealand entomologist, George Vincent Hudson, in 1895. Credit is also given to British businessman William Willet for his idea that DST is a way to get up early and enjoy more daylight hours even after work is already finished. Initially, the clock adjustments started in Austria and Germany in order to save coal usage. During the energy crisis in the 1970s, DST became a widespread practice across the world.