In which country is Mother's Day celebrated on the fourth Sunday of Lent?

In the United Kingdom, Mother’s Day is traditionally celebrated on the fourth Sunday of Lent. The occasion is more properly called Mothering Sunday, although modern British usage commonly calls it Mother’s Day.

The tradition began with Christians visiting their “mother church”—the church where they were baptized, their local parish church, or sometimes a cathedral—on Laetare Sunday, the fourth Sunday in Lent. Domestic servants and apprentices were often given time off to make the journey, which also allowed families to reunite.

Mothering Sunday is not simply the British version of the American second-Sunday-in-May holiday. Its date moves each year because Lent and Easter move. In the 20th century, Constance Penswick Smith helped revive the observance, and it gradually became a broader celebration of mothers and motherhood. Ireland also observes Mothering Sunday, but the United Kingdom is the canonical answer among the listed choices.