In the U.S. Mothers' Day is a holiday celebrated on second Sunday in May. It is a day when children honor their mothers with cards, gifts, and flowers. First observance in Philadelphia, Pa. in 1907, it is based on suggestions by Julia Ward Howe in 1872 and by Anna Jarvis in 1907.
Although it wasn't celebrated in the U.S. until 1907, there were days honoring mothers even in the days of ancient Greece. In those days, however, it was Rhea, the Mother of the gods that was given honor.
Later, in the 1600's, in England there was an annual observance called "Mothering Sunday." It was celebrated during June, on the fourth Sunday. On Mothering Sunday, the servants, who generally lived with their employers, were encouraged to return home and honor their mothers. It was traditional for them to bring a special cake along to celebrate the occasion.