[Answer] Which of these Founding Fathers never signed the Declaration of Independence?

Step 1 : Introduction to the question "Which of these Founding Fathers never signed the Declaration of Independence?"

...56 men signed the Declaration of Independence, however George Washington was not one of them. George Washington did not sign the Declaration of Independence because in July 1776 he was in New York preparing to defend Manhattan against the British. Washington took command of the Revolutionary forces in Massachusetts on July 3, 1775. He was with his troops a year later when on July 4, 1776 —the Declaration of Independence was adopted. He, therefore, did not vote for or sign the Declaration of Independence.

[Answer] When did Father's Day become an official U.S. holiday?

Step 1 : Introduction to the question "When did Father's Day become an official U.S. holiday?"

...The nation's first celebration to honor the importance of fathers was in a West Virginia church in July, 1908. The intention was to memorialize 362 men lost in a mining explosion the previous December. This was a single event, however, that wasn't repeated the following year. Sonora Smart Dodd of Spokane, Washington, tried the following year to establish an official day to celebrate fathers. The idea spread slowly, but in 1972, Richard Nixon finally made Father's Day a federal holiday. Source: History.com