The document summarizes the events and ceremonies of the Easter Tridium, which includes Holy Thursday, Good Friday, Holy Saturday and Easter Sunday. It describes the Last Supper on Holy Thursday and foot washing ceremony. It explains that Good Friday is a day of fasting and commemorating Jesus' crucifixion. Masses are held with bare altars on Holy Thursday and Good Friday. Easter Sunday mass includes lighting of the Paschal candle to represent Jesus guiding believers.