“Rejoice, O Jerusalem!” That’s the Introit (opening verse) of today’s Mass. In the Traditional Latin Mass, the Epistle is Galatians 4:22-31, where St. Paul speaks of, “that Jerusalem which is above, which is free, which is our mother.” That’s why in the British Isles this is known as Mothering Sunday (https://en.wikipedia.org/wiki/Mothering_Sunday).
My one Catholic grandmother was wont to say, “I wish I was in Heaven,” which is a much less alarming way of telling your friends and family, “I wish I were dead.” The hymn “Jerusalem, My Happy Home,” apparently written by an English Catholic priest who lived in hiding during the Protestant Revolt, captures the same longing (https://www.youtube.com/watch?v=_ySssVj7XCs). The traditional Roman station for Laetare Sunday is the Basilica of Holy Cross in Jerusalem. For more information about Laetare Sunday, click here: http://www.salvemariaregina.info/SalveMariaRegina/SMR-164/Laetare%20Sunday.html.