This Tuesday just how old is this great nation of ours?

241 since Declaration of Independence.

Depends on which rubber ruler you use. Independence was declared on July 4th, 1776 - but the Treaty of Paris, which formally ended the War of Independence and established the United States, was not signed by the King until September 3rd, 1783 - and that was ratified by Congress on January 14th, 1784. So officially the USA will be 134 next January.

probably 2017