Hopefully fix a weird error which only happens with pytz 2011b without breaking Python 3 support
Hopefully fix a weird error which only happens with pytz 2011b without breaking Python 3 support

davidfraser/python-datetime-tz,mithro/python-datetime-tz,j5int/python-datetime-tz,j5int/python-datetime-tz,matthewhampton/python-datetime-tz,davidfraser/python-datetime-tz,mithro/python-datetime-tz