What is Chrism Mass?

During Holy Week, an important liturgical celebration occurs that only takes place in the cathedral, but touches many lives in every parish in the diocese. It is, of course, the Chrism Mass at which the Holy Oils to be used in every parish are consecrated, blessed and distributed.

It is also the occasion at which the priests of the diocese concelebrate Mass with the bishops to manifest the unity of the presbyterate (the priests) with the episcopate (the bishops). During the celebration all of us renew our priestly vows.

http://bishopkevinfarrell.org/2015/03/what-is-the-chrism-mass/