Octave of Pentecost

During the Octave of Pentecost the Church celebrates more especially the glories of the grace of the Holy Ghost and His secret work of sanctification in the Mystical Body of Christ.

Originally the feast of Pentecost brought to an end in Rome the fifty days of the Easter celebrations and introduced the fast of the Ember Days of the summer quarter. Afterwards it became customary to continue the festivity for two more days, the Monday and the Tuesday, and, finally, after the time of Pope St. Leo the Great it was extended like the Octave of Easter through the entire week.

As Fish Eaters relates, "In medieval times, families in many parts of Europe would suspend a carved and painted wooden dove over their dining table. Such a custom could be easily revived for the throughout the Octave of the Pentecost -- and imagine that dining room table covered with a white tablecloth, sprinkled with red rose petals, and with a vase of columbine at its center."

The Christian Pentecost, prefigured by the ancient one of the Jews, is of the number of the feasts that were instituted by the apostles. As we have already remarked, it formerly shared with Easter the honour of the solemn administration of Baptism. Its octave, like that of Easter, and for the same reason, ended with the Saturday following the feast. The catechumens received Baptism on the night between Saturday and Sunday. So that the Pentecost solemnity began on the vigil, for the neophytes at once put on their white garments: on the eighth day, the Saturday, they laid them aside.

Dom Guéranger, O.S.B. in The Liturgical Year

Up until 1955 but after the time of Pope St. Pius X, Octaves were arranged in the following hierarchical order:

• Privileged Octaves
  • Privileged Octaves of the First Order
    • Octave of Easter
    • Octave of Pentecost (Notice it's rank in the utmost category!)
  • Privileged Octaves of the Second Order
    • Octave of Epiphany
    • Octave of Corpus Christi
  • Privileged Octaves of the Third Order
    • Octave of Christmas
    • Octave of the Ascension
    • Octave of the Sacred Heart
• Common Octaves
  • Octave of the Immaculate Conception of the BVM
  • Octave of the Solemnity of St. Joseph
  • Octave of the Nativity of St. John the Baptist
  • Octave of Saints Peter and Paul
  • Octave of All Saints
  • Octave of the Assumption of the BVM
• Simple Octaves
  • Octave of St. Stephen
  • Octave of St. John the Apostle
  • Octave of the Holy Innocents