Maybe this is too much information but…
America wasn’t “born” today. It was conceived. Procreated if you will. There had been standing political tension in the colonies and during a hot (see what I did there) date in Philadelphia in 1776, the colonists finally consummated their political longings by signing the Declaration of Independence.
Want more proof? Why do you think we set off fireworks, people? In celebration, or in the simulation of the impregnation that led to the creation of the United States?
Warped, I know, but as a friend of mine pointed out to me as I joked to her about things, the first president wasn’t elected until 1789… Which seems like a more applicable formal birthday.