This provision of an alternative collect was the equivalent of granting the Lenten celebration of Our Lady of Sorrow the rank of memorial, since during Lent a memorial, even if otherwise obligatory, is represented in the liturgy of the day at most by optional use of its collect. The liturgical calendar of Malta gives the celebration the rank of feast, making its observance obligatory. Observance of the Tridentine Mass calendar as it stood in 1962 is still permitted in the circumstances indicated in the 2007 document "Summorum Pontificum", giving Our Lady of Sorrows a commemoration within the liturgy of the Friday.