New patches against 2.4.4 and the trunk, providing tm_gmtoff, tm_zone, strptime enhancements, a timegm function, plus tests. Where a platform supports the timezone and altzone module attributes but not tm_gmtoff and tm_zone struct tm fields, the code attempts to populate the struct_time fields appropriately, setting None values only if no timezone information exists whatsoever. Limitations include the inability to parse/obtain timezone information beyond that provided by system calls, which is an existing limitation that affects the strptime implementation amongst other things.

Again, testing for "deficient" platforms with limited struct tm definitions has been limited.
File Added: tm_gmtoff_zone_timegm.diff