[ebb tide]

Celebration and Sacrifice are not mutually exclusive things in the Catholic Mass.

The Sacrifice of the Mass

[ebb tide]

The sacrifice of the Mass began at the Last Supper and it ended on Calvary. It began at the Last Supper because it was there, surrounded by the Twelve, that the Savior did two things. He first transformed the elements of bread and wine into His own Body and Blood and by separately consecrating each element, signifying the separation of His Body and Blood that would be the expression of His death on the next day. He therefore both transubstantiated bread and wine into Himself and He offered Himself to His heavenly Father.

[Bayard]

The first paragraph.

>>We know that in Sacred Writing and in the teachings of the Church, the Mass has acquired a variety of synonymous names. It is called the Eucharistic Sacrifice, the Eucharistic Liturgy, or simply, the Liturgy; it is the Eucharistic celebration, the Holy Sacrifice, or the Sacrifice of the Altar.<<

Do you even read what you link?