Thanks to the wonders of duck typing, pandas.Timestamp happily accepts pywintypes.TimeType objects (otherwise known as pywintypes.datetime), including those that employ the win32timezone.TimeZoneInfo object. And most methods work.

For some reason, to_datetime does not, and indeed it crashes:

import pandas as pd from win32timezone import TimeZoneInfo from pywintypes import TimeType x = TimeType(2012,12,1,0,0,tzinfo=TimeZoneInfo('GMT Standard TIme')) y = pd.Timestamp(x) print(y) y.tzinfo y.utcoffset() y.to_datetime64() y.to_datetime() 

This occurs with Anaconda installed win64 Python 3.4.3 and Pandas 0.16.2.

I'm going to see if I can't dig down to find a key source of failure. Stay tuned