Davis also said the former President John Adams drafted the Declaration of Independence on July 2. After that, it took two days after the US Congress approved Thomas Jefferson’s statement. Therefore, according to Davis, the independence day of the United States is July 2. But today, the day when people celebrate and organize parades to mark the nation’s independence day is July 4. This was officially recognized and July 4 is the National Day of the United States. National Day is not only a great day but also a day of death for many US presidents. History has recorded that three of the country’s first five presidents died on the National Day. In it, John Adams, the second president and Thomas Jefferson, the third president were rivals during the political career but died a few hours apart on the occasion of the 50th anniversary of the national day.