The Twenty-foukth and Last Sunday after Pentecost
The number of the Sundays after Pentecost may exceed twenty-four, and go as far as twenty-eight, according as Easter is each year more or less near to the vernal equinox. But the Mass here given is always reserved for the last ; and the intervening ones, be their number what it may, are taken from the Sundays after the Epiphany, which, in that case, were not used at the beginning of the year.
Chapter 28 of 33