Possible Duplicate:
When does a day start?

What timezone is used to calculate daily reputation, caps etc ?

When "today" will be yesterday?

marked as duplicate by Michael Mrozek, Michael Petrotta, Lance Roberts, Pops, Jeff Atwood Aug 3 '11 at 22:21

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Coordinated Universal Time, or UTC Time, is used to determine dates on Stack Exchange. You can see the current UTC time by hovering over the arrow next to your username at the top of each page – a window appears with the UTC Time at the bottom-left.

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