The next upcoming Assumption of Mary is on Thursday August 15th, 2019.
Most Catholics go to church and attend to festivals consisting of sporting events, parades, markets, or communal meals.
Assumption of Mary was the day when the mother of Jesus Christ departed from this life and assumed into heaven. The Assumption of Mary has been celebrated since the fourth century CE as it was an important date in Christian history. However it wasn't until Pope Pius XII ruled that it would be an official holiday in 1950.