The deaths of John Adams and Thomas Jefferson on July 4, 1826, coincided with which anniversary?

The deaths of John Adams and Thomas Jefferson on July 4, 1826, coincided with the 50th anniversary of American independence.

Both men were former presidents and major figures in the founding era. Adams died in Quincy, Massachusetts, and Jefferson died at Monticello in Virginia on the same day. Jefferson died earlier in the afternoon; Adams’s reported final words expressed the belief that Jefferson still lived, unaware that his fellow founder had died hours earlier.

The coincidence became one of the most memorable dates in U.S. history. July 4, 1826, was the semicentennial of the Declaration’s adoption in 1776. Adams and Jefferson had both participated in the independence movement, and Jefferson had drafted the Declaration’s principal text. Their deaths added a powerful symbolic chapter to the nation’s early anniversary history.