Mass at 12 Noon and at 7 pm
Holy Day of Obligation
Sunday Mass and Holy Day Obligation
https://www.ewtn.com/expert/answers/sunday_mass.htm
Solemnity of the Assumption of Mary – Franciscan Media
The history of the Assumption – and why it’s a Holy Day of Obligation
Understanding and Celebrating the Feast of the Assumption
Feast of the Assumption – New Advent