User blog comment:ProcrastiNutter/Argh!/@comment-24459124-20140331212726/@comment-24489486-20140403131931

I've only just realised how the timing works - everything's related to UTC - so the counter clicks over at midnight UTC, irrespective of the local time zone. Weirdness. Not much of a problem, except that it means a half-hour session over midnight won't count for two days - not until September, anyway...