def METHOD_NAME(self, reference_date: datetime.date) -> Set[pendulum.Date]:
    """
    Given a reference date to calculate the offsets relative to, return
    this date stencil as a set of dates.
    Parameters
    ----------
    reference_date : date
        Date to calculate offsets relative to.
    Returns
    -------
    set of pendulum.Date
        Set of dates represented by the stencil
    """
    date_pairs = self.as_date_pairs(reference_date=reference_date)
    # Have to subtract a day from pair[1] here because pendulum.Period.range returns a range inclusive of both limits
    dates = set().union(
        *[pendulum.period(pair[0], pair[1].subtract(days=1)) for pair in date_pairs]
    )
    return dates