(WJLA) - You've got a few days left before it's time to set your clocks back an hour.
Daylight saving time ends for 2013 overnight between Saturday and Sunday, meaning that before you go to bed Saturday, make sure to turn the clocks in your house back one hour.
The concept of daylight saving time emerged in the late 1800s and was first implemented in parts of Europe during World War I. DST came to the United States in 1918, according to National Geographic, and was made mandatory nationwide during World War II.
After the end of the war, the government made daylight saving time optional for each state again. To this date, neither Arizona nor Hawai'i set their clocks forward or back.
The practice of daylight saving time was extended by a month in 2007, thanks to the Energy Policy Act.
According to National Geographic, the debate over whether or not setting clocks forward during the spring and summer months actually saves energy, as has long been one of the many modern reasons to keep it around.