def find_dates(text, source=False, index=False, strict=False, base_date=None):
date_finder = DateFinder(base_date=base_date)<EOL>return date_finder.find_dates(text, source=source, index=index, strict=strict)<EOL>
Extract datetime strings from text

:param text:
    A string that contains one or more natural language or literal
    datetime strings
:type text: str|unicode
:param source:
    Return the original string segment
:type source: boolean
:param index:
    Return the indices where the datetime string was located in text
:type index: boolean
:param strict:
    Only return datetimes with complete date information. For example:
    `July 2016` of `Monday` will not return datetimes.
    `May 16, 2015` will return datetimes.
:type strict: boolean
:param base_date:
    Set a default base datetime when parsing incomplete dates
:type base_date: datetime

:return: Returns a generator that produces :mod:`datetime.datetime` objects,
    or a tuple with the source text and index, if requested