There probably were not a lot of us that noticed it during the countdown to midnight last Saturday, but this year, time needed a tweak. At 23:59:59 on December 31, 2016, an additional second was added to UTC (Universal Time Coordinated) so that, for exactly one second, UTC time was 23:59:60. This might sound a little “who cares” for most of us, but managing the Leap Second is, among other things, essential for little things like running the Internet, and ensuring GPS doesn’t think you’re halfway to the moon when you’re just trying to find your mother-in-law’s house (literally).
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