def _find_date(filename):
    """Find date in recorded game default(ish) filename."""
    has_date = re.search(MATCH_DATE, filename)
    if has_date:
        year = has_date.group('year')
        month = has_date.group('month')
        day = has_date.group('day')
        if int(year) > 2000 and int(month) in range(1, 13) and int(day) in range(1, 32):
            return '{}-{}-{}'.format(year, month, day)
Find date in recorded game default(ish) filename.