Nine informative points, including the two below, from Joe Carter at The Gospel Coalition:
1. After listening to a Mother’s Day sermon in 1909, Sonora Dodd of Spokane, Wash. wanted a special day to honer her father, a widowed Civil War veteran who was left to raise his six children on a farm. The first Father’s Day celebration, June 17, 1910, was proclaimed by Spokane’s mayor because it was the month of Smart’s birth.
2. The first presidential proclamation honoring fathers was issued in 1966 when President Lyndon Johnson designated the third Sunday in June as Father’s Day. Father’s Day has been celebrated annually since 1972 when President Richard Nixon signed the public law that made it permanent.
You can read the whole thing here.