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        Guess what? You'll get an extra second of sleep tonight! Woot!

Gaining and losing an hour is a yearly thing.

Gaining a day happens once every four years.

But gaining a second?

It actually happens about every 18 months [1] (but not on any type of set
schedule). Wall Street is freaking out [2] about it. What about you? Will you
be watching Bobby Cannavale screaming “Leap Second!” [3]? Or will you just
spend an extra second sleeping tonight?

[1] https://en.wikipedia.org/wiki/Leap_second#Insertion_of_leap_seconds
[2] http://www.wsj.com/articles/markets-are-jumpy-over-coming-leap-second-1431988248
[3] https://www.youtube.com/watch?v=U2WlQZf9zSg&t=113

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