This weekend, the Church celebrates Pentecost, one of the most important feast days of the year that concludes the Easter season and celebrates the beginning of the Church.   Here's what you need to know about the feast day:

May 21-The Feast of the Ascension commemorates Jesus' ascension into heaven 40 days after his resurrection. Thus Ascension Day falls 40 days after Easter, on the 6th Thursday of Easter. In some parts of the world, the solemnity is celebrated on the Sunday after the traditional date.

May 13 is the anniversary of the apparition of Our Lady to three shepherd children in the small village of Fatima in Portugal in 1917. She appeared six times to Lucia, 9, and her cousins Francisco, 8, and his sister Jacinta, 6, between May 13, 1917 and October 13, 1917.