 Are you stretching the July 4th holiday right into the weekend? Not only is it the anniversary of the birth of our nation, WTOP's Jimmy Alexander tells us that it's also a date that has extra meaning to several former commanders-in-chief. There are a lot of connections to U.S. presidents. Author and D.C. tour guide Rebecca Grau. July 4th was the birthday of President Calvin Coolidge in 1872.