If the new daylight law is enacted, it seems that that the only thing in Windows that needs to be changed is the Visual C++ library file, MSVCRT.DLL. This doesn't mean that everyone would upload the patch though.
This was the file at center of the April 01 2001 daylight savings time snafu. See the links below:
Slashdot Mirror
This was the file at center of the April 01 2001 daylight savings time snafu. See the links below:
http://www.langa.com/newsletters/1999/jan-18-99.ht m
Microsoft's Unintentional April's Fool's Bug
http://www.cknow.com/articles/62/1/Computer-Knowle dge-Newsletter-Archive---1999/print/62
http://www.rescomp.upenn.edu/docs/hype/old/aprilon e.html