Traceback (most recent call last):

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/tseries/tests/test_timeseries.py", line 4335, in test_to_datetime_with_non_exact
result = to_datetime(s,format='%d%b%y',exact=False)

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/util/decorators.py", line 89, in wrapper
return func(*args, **kwargs)

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/tseries/tools.py", line 267, in to_datetime
unit=unit, infer_datetime_format=infer_datetime_format)

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/tseries/tools.py", line 373, in _to_datetime
values = _convert_listlike(arg.values, False, format)

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/tseries/tools.py", line 366, in _convert_listlike
raise e

 "/Users/ch/repo/pandas/.tox/py34/lib/python3.4/site-packages/pandas/tseries/tools.py", line 336, in _convert_listlike
arg, format, exact=exact, errors=errors)

 "tslib.pyx", line 3018, in pandas.tslib.array_strptime (pandas/tslib.c:44557)ValueError: time data '19MAY11' does not match format '%d%b%y' (search)
Traceback (most recent call last):

 "<stdin>", line 1, in <module>

 "/usr/local/lib/python2.7/dist-packages/pendulum/pendulum.py", line 242, in parse
tzinfo=tz

 "/usr/local/lib/python2.7/dist-packages/pendulum/pendulum.py", line 184, in __init__
hour, minute, second, microsecond

 "/usr/local/lib/python2.7/dist-packages/pendulum/tz/timezone.py", line 80, in convert
return dt.__class__(*converted)ValueError: day is out of range for month