(e.g. 01/05/09) as the day (``True``) or month (``False``). If ``yearfirst`` is set to ``True``, this distinguishes between YDM and YMD. If set to ``None``, this value is retrieved from the current :class:`parserinfo` object (which itself defaults to ``False``). :param yearfirst: Whether to interpret the first value in an ambiguous 3-integer date (e.g. 01/05/09) as the year. If ``True``, the first number is taken to be the year, otherwise the last number is taken to be the year. If this is set to ``None``, the value is retrieved from the current :class:`parserinfo` object (which itself defaults to ``False``). :param fuzzy: Whether to allow fuzzy parsing, allowing for string like "Today is January 1, 2047 at 8:21:00AM". :param fuzzy_with_tokens: If ``True``, ``fuzzy`` is automatically set to True, and the parser will return a tuple where the first element is the parsed :class:`datetime.datetime` datetimestamp and the second element is a tuple containing the portions of the string which were ignored: .. doctest:: >>> from dateutil.parser import parse >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True) (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at ')) :return: Returns a :class:`datetime.datetime` object or, if the ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the first element being a :class:`datetime.datetime` object, the second a tuple containing the fuzzy tokens. :raises ParserError: Raised for invalid or unknown string formats, if the provided :class:`tzinfo` is not in a valid format, or if an invalid date would be created. :raises OverflowError: Raised if the parsed date exceeds the largest valid C integer on your system. )