The traditional Roman Missal has 6 Sunday Masses assigned for the Time After Epiphany and 24 Sunday Masses assigned for the Time After Pentecost. Taken together, with the other Masses assigned for Sundays, the traditional Roman Missal has a total of 53 Sunday Masses (enough for each week of the year). But depending on how early or late Easter is in a given year, there may be less than 6 actual Sundays after Epiphany and more than 24 actual Sundays after Pentecost. When this happens, those prayers and readings from the Sunday Masses which were not said during Time After Epiphany are said on the Sundays between the 23rd and 24th Sundays After Pentecost (the 24th Sunday After Pentecost is always said on the Sunday immediately before the 1st Sunday of Advent). On these “Resumed” Sundays After Epiphany, the proper chants (Introit, Gradual, Alleluia, Offertory, and Communion) of the 23rd Sunday are repeated. If there are less than 24 actual Sundays after Pentecost, the Mass assigned for the 23rd Sunday After Pentecost is omitted.