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On July 4, 1826, Presidents Thomas Jefferson and John Adams both died on the 50th anniversary of the Declaration of Independence. President John Quincy Adams called their deaths the "visible and palpable remarks of Divine Favor".From the article:
"Less than a month before his death, Adams issued a statement about the destiny of the United States, which historian Joy Hakim characterized as a warning for his fellow citizens: "My best wishes, in the joys, and festivities, and the solemn services of that day on which will be completed the fiftieth year from its birth, of the independence of the United States: a memorable epoch in the annals of the human race, destined in future history to form the brightest or the blackest page, according to the use or the abuse of those political institutions by which they shall, in time to come, be shaped by the human mind."
On July 4, 1826, the 50th anniversary of the adoption of the Declaration of Independence, Adams died at his home in Quincy at approximately 6:20 PM. At age 90, Adams was the longest-lived US president until Ronald Reagan surpassed that age in 2001. Adams's crypt lies at United First Parish Church in Quincy, Massachusetts, with his wife Abigail and son John Quincy Adams. At the time of his death, John Quincy Adams was serving as U.S. president. When Adams died, his last words included an acknowledgement of his longtime friend and rival: "Thomas Jefferson survives." Adams was unaware that Jefferson had died several hours before."