The US, and a few other countries that have Daylight Savings Time, will revert back to Standard Time tonight. Europe also uses the Daylight Savings Time. Russia ended it this year – Putin's orders.
Not all states in the US change their clocks. For them, they will do nothing at all. Arizona and Hawaii do not observe it, and some US territories don't either, such as Puerto Rico, Guam, the virgin Islands, and more.
The actual time change takes place (officially) around 2:00 am. No, I'm not staying up just for that purpose – and I hope you don't either. I’ve already changed mine.
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Source: http://www.webexhibits.org/daylightsaving/b.html
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Photo Credit: Unchanged; from https://www.flickr.com/photos/denisemattox/6829441324
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Keywords: +clock , +time , +change , +Daylight-Savings-Time