This Sunday, 25 November, in the "New Universal Roman Calendar" (source: USCCB Liturgical calendar) is the Solemnity of Our Lord Jesus Christ, King of the Universe. The subsequent week is the 34th (or Last) Week in Ordinary Time, and it’s conclusion next Saturday evening brings to an end the second of the two Ordinary Time periods, as well as the Liturgical Year. From the National Shrine of St. Jude website:
The "Lectionary," the Mass readings from the Holy Bible, follows a Sunday cycle and a weekday cycle. The Liturgical Calendar follows a three-year cycle, each year being represented by the letters, A, B, and C. During the year A cycle, the Gospel of Matthew is the primary Gospel that is used for the readings. In year B, Mark is the primary Gospel. In year C, Luke is the primary Gospel. The Gospel of John is proclaimed on particular Sundays in each of the years.
The "New Universal Roman Calendar" (sometimes called the “Revised Calendar”), as we recall from this earlier post, was promulgated by Pope Paul VI in 1969 as part of the 1969 Edition of the Roman Missal, also known as the Novus ordo missae, which took effect on the First Sunday of Advent, 1969. In the Revised Calendar, there is “Ordinary Time” (there are two “Ordinary Time” periods, actually) and there is Advent, Lent, Christmas Time and Easter Time. During ordinary Time there is a three year Sunday lectionary cycle as we saw above (A, B and C) and a two year weekday lectionary cycle (Year I, which is odd years, and Year II, which is even years). Advent, Christmas Time, Lent and Easter Time have their own annual set of readings and prayers.
The Traditional Latin Mass 1962 Calendar is much simpler as there’s only one annual cycle (although because of this there’s certainly far fewer Scripture readings over the year: increasing the amount of Scripture was one of the stated reasons for the Revised Calendar). This coming up Sunday is the 24th Sunday After Pentecost (the Solemnity of Christ the King is on the 4th Sunday of October in the old calendar) and the readings for the final week of the liturgical year are either those for whatever Saint’s Day it happens to be, or a free day ("Feria").
Since we’re discussing Calendars and Missals, here’s a plug for a beautiful 1962 Missal,
and a beautiful Novus ordo Daily Roman Missal.
Curate, ut valeatis!