Except the ISP had forgotten to take into account daylight savings time and given the police the wrong customer's details. Oops.
More proof dates aren't easy.
(1) Unambiguous: a time in the past that is represented by the number of seconds since the epoch, Jan 1 1970. When coupled with a location/jurisdiction, they can be converted into a wall-clock time like “1:23pm 04 May 2006 Europe/Paris.”
(2) Ambiguous (but semantically meaningful): a time in the future that would be shown on a clock at the location of the event.
The logging of IP addresses would use the former.
The upcoming trial date for illegal torrenting would use the latter.