I was reading a piece on the 4th of July and found this interesting tidbit from a John Adams' letter:
"The Second Day of July 1776, will be the most memorable Epocha in the History of America. I am apt to believe that it will be celebrated, by succeeding Generations, as the great anniversary Festival," wrote John Adams to his wife Abigail on July 3, 1776.
The second U.S. president had the date wrong, but Heintze maintains that the U.S. really should observe July 2nd—the day Congress voted for independence—as Independence Day. (The signing of the Declaration of Independence didn't begin until August and wasn't complete until November.)
"They didn't have the written document completed until the 4th," Heintze said.
"When they took that document to the printer on July 4th, he printed that date on the top. And that was the broadside that was sent out to all of the new states and the generals in the field. It became widely circulated, and July 2nd was forgotten."