Did you know that Delaware declared independence on June 15, 1776?

History.com says this about June 15, 1776 :

On this day in 1776, the Assembly of the Lower Counties of Pennsylvania declares itself independent of British and Pennsylvanian authority, thereby creating the state of Delaware.

Delaware did not exist as a colony under British rule. As of 1704, Pennsylvania had two colonial assemblies: one for the “Upper Counties,” originally Bucks, Chester and Philadelphia, and one for the “Lower Counties on the Delaware” of New Castle, Kent and Sussex. All of the counties shared one governor.

New York didn't declare independence, no matter what Thomas Jefferson said, until July 19,1776.