Server down an Hour Early??

I read about the server maintenance.

Quote:

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As a reminder, the Settlers Online servers will come down on Thursday morning at 12:00AM PST(3:00AM EST) for a 4.5 hour maintenance.

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But the server just now came down at 00:00 Pacific Daylight Time.
A full hour ahead of 00:00 Pacific Standard Time.

I don't understand why.