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 Grandparents Day
The celebration was introduced to the UK in 1990 by the charity Age Concern. It has been celebrated on the first Sunday in October since 2008, although it is not widely advertised and has not been as commercially successful as Mother's and Father's Day. Businesses specialising in gifts and greeting cards have started merging the respective grandparents days with Mother's Day and Father's Day to try to boost sales.