From: "Geo." 

"Antti Kurenniemi"  wrote in
message news:45ebcad9$1{at}w3.nls.net...

> Calculations are usually done behind the scenes in seconds or milliseconds
> from a fixed epoch (to increase date by one, add XXX seconds to the
> current time). The problem comes when you ask the system what date is
> second 120973240348 - with a bit of bad luck that number falls in the
> place where the new DST rules differ from the old, and you get an
> incorrect result.

Does UTC change with DST? If not then it's just things that are set to go
on local time that will be affected. For example backup software that is
set to do a backup at 10pm will be off by one hour for 3 weeks unless you
change your timezone.

I don't see how that will break anything though.

Geo.

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