In 2018 Assumption of Mary takes place on August 15. That is a solemnity of the Roman Catholic Church, made a dogma in 1950 by Pope Pius XII. Assumption of Mary is an official holiday in Catholic shaped European countries like France, Spain, Italy, Austria, and some parts of Switzerland, Germany and Greece and others.
We have placed a detailed description of this event on this page: Assumption of Mary 2017. For further information please stop by there!