He died July 4, 1826 a few hours before Thomas Jefferson died. His wife was Abigael Adams, and his son was John Quincy Adams, the 6th president of the United States.
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John Adams   John Adams (October 30, 1735 - July 4, 1826) was an American politician and the second President of the United States (1797-1801), after being the first Vice … President (1789-1797) for two terms. He is regarded as one of the most influential Founding Fathers of the United States.
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During the 1770s, he was a delegate to the Continental Congress. In the 1780s, Adams served as a diplomat in Europe and helped negotiate the Treaty of Paris (1783), which officially ended the American Revolutionary War (1775-83). From 1789 to 1797, Adams was America’s first vice president.
http://www.history.com/topics/us-presidents/john-adams
Introduction. John Adams (1735-1826) was a leader of the American Revolution, and served as the second U.S. president from 1797 to 1801. The Massachusetts-born, Harvard-educated Adams began his career as a lawyer.
http://www.history.com/topics/us-presidents/john-adams
John Adams was a lawyer who lived in Boston during the 18th century. He was a one of the Sons of Liberty and a key figure of helping the colonies declare independence against … England.
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In November 1800, John Adams became the first president to reside in the White House. Construction of the presidential home, which was designed by Irish-born architect James Hoban, began in 1792. President Theodore Roosevelt (1858-1919) officially named it the White House in 1901.
http://www.history.com/topics/us-presidents/john-adams
John Quincy Adams (/ˈkwɪnzi/ ; July 11, 1767 – February 23, 1848) was an American statesman who served as the sixth President of the United States from 1825 to 1829.
https://en.wikipedia.org/wiki/John_Quincy_Adams
By great coincidence, John Adams and Thomas Jefferson died in separate states on the same day, 4 July 1826 -- the 50th anniversary of the signing of the Declaration of Independence... Historian David McCullough's biography, John Adams, was a bestseller in 2001.
http://www.who2.com/bio/john-adams/
He served as an all-purpose diplomat for the new republic during the Revolutionary War, and after the war, in 1785, he became the first American Minister to London. He served two terms as vice-president under Washington (1789-97), and beat Thomas Jefferson in 1796 to become president himself. He was respected but not popular, and served one term before losing to Jefferson in the elections of 1800. His son, John Quincy Adams, was president from 1825-29.
http://www.who2.com/bio/john-adams/
John Adams was the second president of the United States and John Quincy Adams was the sixth president and the son of John Adams.
http://www.answers.com/Q/When_is_John_Adams_birthday
when is president john adams birthday
President John Adams birthday is October 30. The birthday of the President John Adams is  on October 30.