[JSLTIGER]

In most cases, DST rules can be revised by a simple patch in most software situations. If you haven't gotten the Windows patch yet, Microsoft has released the patch on their website. Granted, for airlines, it's a bit more complex, as they need to factor in an additional hour for all flights (because we leap forward one hour in spring, each flight in the air at that time takes one hour longer), but it shouldn't be all that much more complicated than a normal year.