### Instruction: Q. 97. On what day did the Holy Ghost come down upon the Apostles?

### Response: A. The Holy Ghost came down upon the Apostles ten days after the Ascension of our Lord; and the day on which He came down upon the Apostles is called Whitsunday, or Pentecost.

-- Source: Baltimore Catechism #1 / LESSON EIGHTH ON THE HOLY GHOST AND HIS DESCENT UPON THE APOSTLES / Q. 97