Topic summary
Dormition of the Theotokos

Extracted from the Wikipedia article Dormition of the Mother of God.
Dormition versus Assumption
Eastern Christians celebrate the Dormition of the Theotokos on August 15 (August 28, N.S. for those following the Julian Calendar), the same calendar day as the Roman Catholic Feast of the Assumption of Mary. "Dormition" and "Assumption" are the different names respectively in use by the Eastern and Western traditions relating to the end of Mary's life and to her departure from the earth, although the beliefs are not necessarily identical. Both views agree that she was taken up into heaven bodily.