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)
International Childfree Day
International Childfree Day is celebrated annually on 1 August. It was created back in 1973 in the United States by the National Alliance for Optional Parenthood, at the time the National Organisation for Non-Parents (N.O.N.), under the name of Non-Parents' Day. The day is aimed at celebrating people who voluntarily choose not to have children and to foster acceptance of the childfree choice. It has also been described as "a day of celebration worldwide for those couples who have faced criticism, ridicule, and rejection because they chose to be Childless by Choice."