Maundy Thursday is generally held on the morning of Maundy Thursday, but may in some dioceses take place on another day during Holy Week. It is often the largest annual gathering of clergy and faithful held in most dioceses. In some dioceses, attendance is sufficiently significant that, due to limited seating, tickets are distributed to parishes. The Mass is a celebration of the institution of the priesthood with Jesus' words at the Last Supper, "Do this in memory of me." During the Mass, those present are called to renew their baptismal promises; priests/ministers and deacons also reaffirm their ministry by renewing the
Holy Week Passion Week (the week before Holy Week) to the level of a commemoration, and in 1969 the celebration was removed from the General Roman Calendar as a duplicate of the September feast. Observance of the calendar as it stood in 1962 is still permitted as an extraordinary form of the Roman Rite, and even where the calendar as revised in 1969 is in use, some countries, such as Malta, have kept it in their national calendars. In every country, the 2002 edition of the Roman Missal provides an alternative collect for this Friday: <poem> O God, who in this season