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I've found another bug.
Line 167 & 169 of Lib/_strptime.py contains the expression:
 time.tzname[0].lower()

I guess this is intended to normalize alphabets, but for 
multibyte characters this is really dangerous.

>>> import time
>>> time.tzname[0]
'\x93\x8c\x8b\x9e (\x95W\x8f\x80\x8e\x9e)'
>>> _.lower()
'\x93\x8c\x8b\x9e (\x95w\x8f\x80\x8e\x9e)'

\x95W and \x95w is not the same character.