Father`s Day, in the United States, holiday (third Sunday in June) to honour fathers. Credit for originating the holiday is generally given to Sonora Smart Dodd of Spokane, Washington, whose father, a Civil Warveteran, raised her and her five siblings after their mother died in childbirth. She is said to have had the idea in 1909 while listening to a sermon on Mother`s Day, which at the time was becoming established as a holiday.

https://www.britannica.com/topic/Fathers-Day