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)
National Family Week
"National Family Week" in the United States takes place the week of American Thanksgiving. It was first proclaimed by Richard Nixon in 1972 pursuant to a resolution introduced in Congress by Representative John Myers (R-IN) upon the suggestion of a constituent, Sam Wiley. It is led annually by the National Family Week Foundation, established by Mr. Wiley and now managed by John Palatiello, a former staff assistant to Rep. Myers. President Donald Trump proclaimed the week of November 18 through November 24, 2018, as National Family Week.