Quite a few people have written asking whether this coming Saturday, 15 August, the Feast of the Assumption, is a Holy Day of Obligation.
The answer is – at least for the United States – NO, it is not.
According to the USCCB, when certain Holy Days of Obligation fall on a Saturday, the obligation is abrogated. That is to say, if it is on Saturday and you don’t go to Mass, you don’t sin for having missed a Mass of obligation, of "precept".
Whenever January 1, the solemnity of Mary, Mother of God, or August 15, the solemnity of the Assumption, or November 1, the solemnity of All Saints, falls on a Saturday or on a Monday, the precept to attend Mass is abrogated.
That said… I think it is a good thing to go to Mass on these beautiful feasts!