1. When does the Triduum begin and end? The Easter Triduum begins with the evening Mass of the Lord’s Supper, reaches its high point in the Easter Vigil, and closes with evening prayer on Easter Sunday.
2. May another Mass besides the Mass of the Lord’s Supper be celebrated on Holy Thursday? Ordinarily, no other Mass may be celebrated on Holy Thursday. However, by way of exception, the local Ordinary may permit another Mass in churches and oratories to be celebrated in the evening, and, in the case of genuine necessity, even in the morning. Such Masses are provided for those who in no way are able to participate in the evening Mass.