The Solemnity of the Assumption of the Blessed Virgin Mary, celebrated each year on August 15, commemorates the time Mary’s body and soul were assumed into heaven, and her passing into eternal life.
According to the Catechism of the Catholic Church 966: “The Assumption of the Blessed Virgin is a singular participation in her Son’s Resurrection and an anticipation of the resurrection of other Christians.”
The celebration of the Assumption of the Blessed Virgin Mary began in the sixth century. It was defined dogma of the Catholic Church by Pope Pius XII in 1950 in the encyclical Munificentissimus Deus.
The Assumption is a holy day of obligation, which requires Catholics to sanctify the day by participating in the Eucharistic celebration.