The Feast of the Assumption of The Blessed virgin Mary - St Mary's Cathedral Sandakan

According to the belief of Christians of the Roman Catholic Church, the Eastern Catholic Churches, Eastern Orthodoxy, Oriental Orthodoxy, and parts of the Anglican Communion and Continuing Anglicanism, the Assumption of Mary was the bodily taking up of the Virgin Mary into Heaven at the end of her life. The Roman Catholic Church teaches as dogma that the Virgin Mary "having completed the course of her earthly life, was assumed body and soul into heavenly glory."[1] This doctrine was dogmatically and infallibly defined by Pope Pius XII on November 1, 1950, in his Apostolic Constitution Munificentissimus Deus. This belief is known as the Dormition of the Theotokos by the Eastern and Oriental Orthodox Churches. In the churches which observe it, the Assumption is a major feast day, commonly celebrated on August 15. In many countries it is a Catholic Holy Day of Obligation.

In his August 15, 2004, homily given at Lourdes, Pope John Paul II quoted John 14:3 as one of the scriptural bases for understanding the dogma of the Assumption of Mary. In this verse, Jesus tells his disciples at the Last Supper, "If I go and prepare a place for you, I will come again, and will receive you to myself; that where I am, you may be there also." According to Catholic theology, Mary is the pledge of the fulfillment of Christ's promise.

The feast of the Assumption on August 15 is a public holiday in many countries, including Austria, Belgium, Chile, Ecuador, France, Greece, Lebanon, Italy, Malta, Poland, Portugal, Senegal and Spain . In Eastern Orthodox churches following the Julian Calendar, the feast day of Assumption of Mary falls on August 28, and is a public holiday in the Republic of Macedonia.

The Assumption is important to many Catholic and Orthodox Christians as the Virgin Mary's heavenly birthday (the day that Mary was received into Heaven). Her acceptance into the glory of Heaven is seen by them as the symbol of the promise made by Jesus to all enduring Christians that they too will be received into paradise. The Assumption of Mary is symbolised in the Fleur-de-lys Madonna.

The present Italian name of the holiday, "Ferragosto", may derive from the Latin name, Feriae Augusti ("Holidays of the Emperor Augustus"), since the month of August took its name from the emperor. The Solemnity of the Assumption on August 15 was celebrated in the eastern Church from the 6th Century. The Catholic Church adopted this date as a Holy Day of Obligation to commemorate the Assumption of the Blessed Virgin Mary, the real physical elevation of her sinless soul and incorrupt body into Heaven.

The Solemnity of the Assumption on August 15 is a public holiday in many countries, including Andorra, Austria, Belgium, Bosnia, Burundi, Cameroon, Central African Republic, Chile, Republic of Congo, Côte d'Ivoire, Croatia, Colombia, Cyprus, East Timor, France, Gabon, Greece, Republic of Guinea, Haiti, Italy, Lebanon, Lithuania, Luxembourg, Republic of Macedonia, Madagascar, Malta, Mauritius, Republic of Moldova, Monaco, Paraguay, Poland, Portugal, Romania, Rwanda, Senegal, Seychelles, Slovenia, Spain, Switzerland, Tahiti, Togo, and Vanuatu. It is also a holiday in some predominantly Catholic states of Germany, including Bavaria and Saarland. In Guatemala it is observed in Guatemala City and in the town of Santa Maria Nebaj, both of which claim her as their patron saint. Also, this day is combined with Mother's Day in Costa Rica. In many places, religious parades and popular festivals are held to celebrate this day. Prominent Catholic and Orthodox countries in which Assumption day is an important festival but is not recognized by the state as a public holiday include Argentina, Brazil, Czech Republic, Ireland, Mexico, the Philippines and Russia. In Canada, Assumption Day is the Fête Nationale of the Acadians, of whom she is the patron saint. Businesses close on that day in heavily francophone parts of New Brunswick, Canada. The Virgin Assumed in Heaven is also patroness of the Maltese Islands and her feast, celebrated on 15 August, apart from being a public holiday in Malta is also celebrated with great solemnity in all the local churches especially in the seven localities known as the Seba' Santa Marijiet. In Anglicanism and Lutheranism, the feast is kept, but without official use of the word "Assumption".