Father's Day
Father's Day, is observed on the feast day of Fathers. It is celebrated as a public international day, like in many other countries including the U.S., on the third Sunday of June.
In Greece, like in other European countries, this day is named (Fête des Peres/Feast of Fathers)
Mother's Day
The United States celebrates Mother's Day on the second Sunday in May. In 1872 Julia Ward Howe called for women to join in support of disarmament and asked for 2 June 1872, to be established as a "Mother's Day for Peace". Her 1870 "Appeal to womanhood throughout the world" is sometimes referred to as Mother's Day Proclamation. But Howe's day was not for honouring mothers but for organizing pacifist mothers against war. In the 1880s and 1890s there were several further attempts to establish an American "Mother's Day", but these did not succeed beyond the local level.