For 10 points, name this Christian holiday, sometimes called Whitsun, which is named for coming fifty days after Easter Sunday.
A sermon delivered by one participant in this event claimed that its participants were not drunk but rather were fulfilling a prophecy from the book of Joel. In the Western liturgical calendar, this event immediately precedes the second period of Ordinary Time and is celebrated using red vestments in the Roman Rite. This event also lends its name to a movement within Charismatic Christianity that is uses glossolalia. This day commemorates the event in chapter two of Acts in which the Holy Spirit descended upon the apostles. For 10 points, name this Christian holiday, sometimes called Whitsun, which is named for coming fifty days after Easter Sunday.
A sermon delivered by one participant in this event claimed that its participants were not drunk but rather were fulfilling a prophecy from the book of Joel.
Pentecost