As you may well know, DST is changing in the USA. All I can say about that is - I'm glad it's not happening here!
Every support site I know of, that has anything to do with computing, and some that don't - are jammed with requests from desperate Exchange admins, trying to find a way to fix the mess that this is causing. Microsoft has released a patch for the DST change, which has so far gone through approximately 25 revisions (yes, 25!). It seems to be causing more problems than it solves, however. It looks like users are finding appointments shifted forwards by a matter of hours, and turning up late to meetings. Of course the Exchange admin gets blamed - but what can you do? Blame Microsoft!
Of course, this may cause even more heartache if the senators decide it wasn't a good idea afterall, and roll back on it later in the year. Boy, wouldn't that be fun!
Have a good weekend...