I don’t find any Sunday Mass readings from Song of Solomon or Song of Songs.
I found the following Weekday Mass readings from Song of Songs:
July 22: St. Mary Magdalene, memorial: First reading selected from either Song of Songs 3:1-4 or 2 Corinthians 5:14-17.
December 21: First reading selected from either Song of Songs 2:8-14 or Zephaniah 3:14-18a.
Also, for the following memorials, the readings are selected from or can be selected from the Common of Virgins. The first reading for the Common of Virgins is selected from either Song of Songs 8:6-7 or Hosea 2:16bc, 17cd, 21-22 or Revelation 19:1, 5-9a or Revelation 21:1-5a:
January 21: St. Agnes, virgin and martyr, memorial.
February 5: St. Agatha, virgin, memorial.
February 10: St. Scholastica, virgin. memorial.
March 3: St. Katharine Drexel, virgin.
April 29: St. Catherine of Siena, virgin and doctor, memorial.
May 25: St. Mary Magdalene de’Pazzi, virgin,
July 6: St. Maria Goretti, virgin and martyr, optional memorial.
July 14: Bl. Kateri Tekakwitha, virgin, memorial.
August 11: St. Clare, virgin, memorial.
August 23: St. Rose of Lima, virgin, optional memorial.
October 1: St. Therese of the Child Jesus, virgin and doctor, memorial.
October 6: Bl. Marie Rose Durocher, virgin, optional memorial.
October 15: St. Theresa of Jesus, virgin and doctor, memorial.
October 16: St. Margaret Mary Alacoque, virgin, optional memorial.
As you can see, Song of Songs is one of two or more optional Weekday readings on the days metioned above so, if you want to hear it, you may have to ask for it.
