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.
Mother's Day in British English
noun
1. US, Canadian, Australian and New Zealand
the second Sunday in May, observed as a day in honour of mothers
2. Also called: Mothering Sunday British and South Africa
the fourth Sunday in Lent, when mothers traditionally receive presents from their children
Mother's Day in American English
US
the second Sunday in May, a day set aside (in the U.S.) in honor of mothers