Rejoice, O Jerusalem...
The Fourth Sunday of Lent is called Lætare (Rejoice) Sunday, from the first words of the liturgy [Introit] above. Since it is in the middle of Lent, like Gaudete Sunday midway through Advent, Lætare reminds us of the Event we look forward to at the end of the penitential season. As on Gaudete Sunday, rose-colored vestments may replace violet, symbolizing, the Church's joy in anticipation of the Resurrection.
In England, this Sunday is known as Mothering Sunday, a custom that arose during the Middle Ages, because the Epistle for the day said, "But Jerusalem which is above, is free, which is the mother of us all" [Galatians 4:26]. The Church is "Jerusalem which is above."
On Lætare Sunday people went to Church where they were baptized (their mother church); and visited their own mothers, as well, often bringing gifts of flowers and simnel cakes (so-called because they were made with fine white flour, or simila.) There are many different recipes for this cake, but all are fruit-cakes covered with almond paste. Mothering Sunday reminds us of the American Mother's Day, although the latter is a holiday honoring mothers which was originated in the early twentieth-century, and though similar, it is unrelated to the Lenten tradition of Mothering Sunday.
Even if we don't celebrate this day as Mothering Sunday (or maybe just don't like fruitcake!) it would be appropriate, on the "Rejoice" Sunday, to have a special treat for the Sunday meal in honor of our Mother, the Church.