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What is an SE “day”? When does each day start?

Can someone please explain when and how the "day" rolls over in SO? In other words, what exactly is a "day" according to the site in regards to reputation and other important things that need a "daily" count? I missed a 200 rep day by 12 rep because the day rolled over, but at 2:10pm local time (Hawaii). Does the day roll over at 00:00 UTC or is there some other definition? Thanks.


It rolls at 00:00 UTC, as you guessed.

  • Thanks. There must be some client-side delay or something to make it appear to roll over at 00:10 today for me. Weird. Thanks! – L0j1k Sep 29 '12 at 0:21

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