the Sunday before Lent
O LORD, who hast taught us that all our doings without charity are nothing worth; Send thy Holy Ghost, and pour into our hearts that most excellent gift of charity, the very bond of peace and of all virtues, without which whosoever liveth is counted dead before thee. Grant this for thine only Son Jesus Christ's sake. Amen.
Quinquagesima is about 50 days before Easter. Source, Bishop Thomas Cranmer . Reflects 1 Cor 13 on Charity.