When Mother’s Day was founded in the early 20th century, it made sense that soon Father’s Day would follow. There is debate about when and how it was determined, but it is generally believed that Father’s Day was also founded in the early 20th century. Dates that are recognized as Father’s Day vary between July and June. It was declared an official holiday by the United States president, Richard Nixon, in 1972. At this time, Father’s Day was recognized as the third Sunday in June.