Setup time functions

    :returns: ``tuple``

def time_stamp():
    """Setup time functions

    :returns: ``tuple``
    """

    # Time constants
    fmt = '%Y-%m-%dT%H:%M:%S.%f'
    date = datetime.datetime
    date_delta = datetime.timedelta
    now = datetime.datetime.utcnow()

    return fmt, date, date_delta, now