Pentecost
What it commemorates
Pentecost commemorates the descent of the Holy Ghost upon the Apostles.
Place in the liturgical year
It is kept fifty days after the Resurrection, on the seventh Sunday after Easter.
In the 1962 Latin Mass Calendar
In the 1962 calendar it is kept as a day of the first class: Dominica Pentecostes. The days of the following week are kept within the octave of Pentecost.
Modern Roman Calendar
The Modern Roman Calendar ranks it as a celebration with precedence over solemnities; its ranks differ from the four classes of 1962.