--- old_DateTime.py     Wed Jan 13 10:21:24 2010
+++ DateTime.py Wed Jan 13 10:20:46 2010
@@ -246,6 +246,7 @@
            'us/samoa':'US/Samoa',
 
            'ut':'Universal',
+           'PDT':'GMT-7', 'pdt':'GMT-7',
            'bst':'GMT+1', 'mest':'GMT+2', 'sst':'GMT+2',
            'fst':'GMT+2', 'wadt':'GMT+8', 'eadt':'GMT+11', 'nzdt':'GMT+13',
            'wet':'GMT', 'wat':'GMT-1', 'at':'GMT-2', 'ast':'GMT-4',