Which U.S. state was the first to officially adopt an annual Thanksgiving before it was a national tradition?

New York

Who plays Marty McFly's eccentric scientist friend in "Back to the Future"? In 'Guess Who?', what body part is most commonly asked about when identifying people? Who is the legendary blues guitarist known for "Crossroads"? Which mammal has the highest blood pressure? Egg knocking is an Easter tradition notably popular in which southern U.S. state?