The annual celebration of the Chrism Mass, held during Holy Week, is "a manifestation of the Priests' communion with their Bishop" (Roman Missal, Third Edition) at which they renew their priestly promises.
Also at this Mass the Oil of the Sick and the Oil of the Catechumenate are blessed and the Sacred Chrism consecrated. Parishes and other Catholic institutions within the diocese are invited to send representatives to receive the Holy Oils.