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When does a day start on the Stack Exchange network?

Some badges (Enthusiast, Fanatic, Mortarboard) and voting limits are bound by and relate heavily to the concept of a day.

Do days correspond to calendar days? What time zone is used?


Are there any voting limits?

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up vote 59 down vote accepted

Yes; a day starts at 00:00 UTC time. Marc Gravell explains so in his answer to this question.

All times (and timestamps) visible anywhere on Stack Exchange follow this time zone.

You can see the current UTC time from the Notification drop down.

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Based on 00:00 UTC, a Stackoverflow day starts at 5PM PST and 8PM EST. During daylight savings, it's 4PM PST and 7PM EST – Chris Koknat Oct 10 '15 at 14:28

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