I have been seeing a lot of people asking about the Energy Policy Act of 2005 and Sun’s patches for this lately. Here are two links that should provide you with all the necessary information for Sun Solaris:

http://java.sun.com/developer/technicalArticles/Intl/USDST/
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102775-1