Some more links discussing similar issues
http://www.sourceware.org/bugzilla/show_bug.cgi?id=154 - tzset not called frequently enough by localtime() and friends

http://stackoverflow.com/questions/12150651/library-code-for-dynamically-reloading-the-usr-share-zoneinfo-database - Workaround in linux for reloading timezone info



http://msdn.microsoft.com/en-US/library/90s5c885(v=vs.100).aspx - Microsoft CRT documentation for _tzset function, which can be called to reset timezone info.



Another possible fix, could be to add an overload for the functions to force reloading of the timezone info.