The ancient Greeks and Romans were hip to how precious moms were; the predecessor to Mother's Day may very well have been a Greek spring festival dedicated to Rhea, mother of the gods and goddesses. In Rome, honoring mothers came in the form of a three-day celebration called Hilaria, where people worshipped the mother goddess Cybele. Some say these Roman ceremonies evolved into England's "Mothering Sunday", a celebration much like our modern Mother's Day, to honor Mary, mother of Christ.