In so many ways, John Adams was perhaps the most prescient of the Founding Fathers. But on one of his forecasts, he was dead wrong. The normally sagacious Adams insisted that July 2 would be the holiday on which Americans would celebrate the birth of their country. July 2, 1776, was the day on which the Continental Congress approved a motion to declare independence from Great Britain. “The second day of July 1776 will be the most memorable epoch…