To sing the proper of the Mass on these Sundays, follow the links:
Sunday May 10th : 5th Sunday of Easter (4th after Easter)
Sunday May 17th: 6th Sunday of Easter (5th after Easter)
Sunday May 24th: Feast of the Ascension of the Lord or 7th Sunday of Easter (Octave of the Ascension)
Sunday May 31st: Pentecost Sunday