Mother's Day by Amrinder Kang

Lamberts thought this day came from a custom of mother worship in ancient Greece, which kept a festival to Cybele, a great mother of Greek gods. Britannica 1959 This festival was held around the Vernal Equinox around Asia Minor and eventually in Rome itself from the Ides of March 15 March to 18 March.In Europe there were several long standing traditions where a specific Sunday was set aside to honor motherhood and mothers such as Mothering Sunday. Mothering Sunday celebrations are part of the liturgical calendar in several Christian denominations, including Anglicans, and in the Catholic calendar is marked as Laetare Sunday, the fourth Sunday in Lent to honour the Virgin Mary and your "mother" church the main church of the area. Historians think that children who served in houses were given a day off on that date so they could visit their families. The children would pick wild flowers along the way to place them on the church or to give them to their mothers.they made mothers day in 1910 by sonora smart dodd after listening to a mothers day sermon

In 1912, Anna Jarvis trademarked the phrases "second Sunday in May" and "Mother's Day", and she created the mothers day Association. She was specific about the location of the apostrophe; it was to be a singular possessive, for each family to honour their mother, not a plural possessive commemorating all mothers in the world. This is also the spelling used by U.S. President Woodrow Wilson in the law making official the holiday in the U.S., by the U.S. Congress on bills, and by other U.S. presidents on their declarations.
Common usage in English language also dictates that the ostensibly singular possessive "Mother's Day" is the preferred spelling, although "Mothers' Day" plural possessive is not unheard of.