I believe though that it doesnt change to daylightsavings as it might be confusing to whtever the logs being logged for.
[02:59] bleh.. when it isnt set back an hour yet..
[02:00] ...now after is set..
as this might cause problems for log parsers and such.. then there's missing an hour..
None the less if this is the case then i do not see why a line isnt set as there are at midnight. ie at some random times. or in one copy of mirc it seems to set at midnight Session Time: Tue Feb 24 23:00:00 2004
im sure there can be a essage something like. Session Time: Tue Feb 24 02:00:00 2004 Daylight Savings
Also it may also be the case that if someoen scriped some sort of script using times something is done and all of a suddent its going back or has a huge gap in time. or even an event triggered at 02:00 would be triggered twice.