N-UNCOUNT 母亲节(在英国是四旬斋的第四个星期日;在美国是五月的第二个星期日。) Mother's Day is a special day on which children give cards and presents to their mothers as a sign of their love for them. In Britain, Mother's Day is the fourth Sunday in Lent. In the United States, it is the second Sunday in May. 母亲节(在英国是四旬斋的第四个星期日;在美国是五月的第二个星期日。)