The following is a key for the various abbreviations used below:
- AR: Date an Amendment was ratified
- AP: Date of the passage of a Constitutional Amendment
- NA: Notable American event
- NW: Notable World event
- PR: Presidential term begins
- SH: Statehood (for original 13 colonies, date Constitution was ratified)
- WR: An event in a U.S. war
Dates are of format YYYY/MM/DD (year, month, day).
1584/07/13 NA – First landing near Roanoke Island (NC)
1585/06/27 NA – Richard Grenville lands at Roanoke
1607/05/14 NA – First landing at Jamestown (VA)
1620/11/09 NA – Mayflower lands at Plymouth (MA)
1689/05/12 WR – King William’s War begins
1697/09/30 WR – King William’s War ends (Peace of Ryswick)
1702/05/04 WR – Queen Anne’s War begins
1713/04/11 WR – Queen Anne’s War ends (Peace of Utrecht)
1744/03/15 WR – King George’s War begins
1748/10/18 WR – King George’s War ends (Treaty of Aix-la-Chapelle)
1754/07/10 NA – The Albany Congress meets
1754/07/03 WR – French and Indian War begins
1763/02/10 WR – French and Indian War ends (Treaty of Paris)
1765/03/22 NA – Declaration of Rights is passed
1770/03/05 NA – Boston Massacre
1773/12/16 NA – Boston Tea Party
1774/03/31 NA – Boston Port Act is passed by Parliament
1774/05/20 NA – Administration of Justice and Massachusetts Government Acts are passed by Parliament
1774/06/02 NA – Quartering Act is passed by Parliament
1774/09/05 NA – First Continental Congress convenes
1774/10/07 NA – Quebec Act is passed by Parliament
1774/10/14 NA – Declaration of Rights and Grievances is passed
1774/10/20 NA – Articles of Association are signed
1775/04/18 WR – American Revolution begins
1775/05/10 NA – Second Continental Congress convenes
1775/07/21 NA – Ben Franklin presents a plan for confederation
1776/06/07 NA – Richard Henry Lee introduces independence resolution
1776/07/04 NA – Declaration of Independence adopted
1776/12/20 NA – Third Continental Congress convenes
1777/11/15 NA – Articles of Confederation proposed
1781/03/01 NA – Articles of Confederation ratified
1783/02/04 WR – English declare hostilities at an end
1783/04/11 WR – America declares hostilities at an end
1784/01/14 WR – Revolutionary War Ends (Treaty of Paris)
1787/05/25 NA – Constitutional Convention opens
1787/09/17 NA – Final draft of the Constitution sent to Congress
1787/12/07 SH – Delaware
1787/12/12 SH – Pennsylvania
1787/12/18 SH – New Jersey
1788/01/02 SH – Georgia
1788/01/09 SH – Connecticut
1788/02/06 SH – Massachusetts
1788/04/28 SH – Maryland
1788/05/23 SH – South Carolina
1788/06/21 SH – New Hampshire
1788/06/21 NA – Constitution Ratified
1788/06/25 SH – Virginia
1788/07/26 SH – New York
1789/03/04 NA – The Constitution goes into effect
1789/04/30 PR – George Washington
1789/07/14 NW – French Revolution
1789/09/25 AP – Amendments 1-10, 27, one unratified amendment
1789/11/21 SH – North Carolina
1790/05/29 SH – Rhode Island
1791/03/04 SH – Vermont
1791/12/15 AR – Amendments 1-10
1792/06/01 SH – Kentucky
1793/03/04 PR – George Washington
1794/03/04 AP – Amendment 11
1795/02/07 AR – Amendment 11
1796/06/01 SH – Tennessee
1797/03/04 PR – John Adams
1801/03/04 PR – Thomas Jefferson
1803/03/01 SH – Ohio
1803/04/30 NA – Louisiana Purchase Treaty signed
1803/12/09 AP – Amendment 12
1804/06/15 AR – Amendment 12
1805/03/04 PR – Thomas Jefferson
1809/03/04 PR – James Madison
1810/05/01 AP – Unratified anti-title amendment
1810/09/16 NW – Mexican independence
1812/04/30 SH – Louisiana
1812/06/18 WR – War of 1812 begins
1813/03/04 PR – James Madison
1814/12/24 WR – War of 1812 ends (Treaty of Ghent)
1815/06/18 NW – Battle of Waterloo (end of Napoleonic Wars)
1816/12/11 SH – Indiana
1817/03/04 PR – James Monroe
1817/12/10 SH – Mississippi
1818/12/03 SH – Illinois
1819/12/14 SH – Alabama
1820/03/15 SH – Maine
1821/03/05 PR – James Monroe
1821/08/10 SH – Missouri
1825/03/04 PR – John Quincy Adams
1827 NW – Greek Independence
1829/03/04 PR – Andrew Jackson
1833/03/04 PR – Andrew Jackson
1836/06/15 SH – Arkansas
1837/01/26 SH – Michigan
1837/03/04 PR – Martin Van Buren
1839 NW – First Opium War begins
1841/03/04 PR – William Harrison
1841/04/04 PR – John Tyler (following death of Harrison)
1842/08/29 NW – First Opium War ends (Treaty of Nanking)
1842/08/29 NW – Hong Kong ceded to Britain
1845/03/03 SH – Florida
1845/03/04 PR – James Polk
1845/12/29 SH – Texas
1846/04/25 WR – Mexican War begins
1846/12/28 SH – Iowa
1848 NW – Communist Manifesto published
1848 NW – Revolutions in Germany, Austria, France, Italy, Belgium
1848/02/02 WR – Mexican War ends (Treaty of Guadalupe Hidalgo)
1848/05/29 SH – Wisconsin
1849/03/05 PR – Zachary Taylor
1850/07/09 PR – Millard Fillmore (following death of Taylor)
1850/09/09 SH – California
1853/03/04 PR – Franklin Pierce
1857/03/04 PR – James Buchanan
1858/05/11 SH – Minnesota
1859/02/14 SH – Oregon
1860/12/20 NA – South Carolina votes to secede
1861/01/09 NA – Mississippi votes to secede
1861/01/10 NA – Florida votes to secede
1861/01/11 NA – Alabama votes to secede
1861/01/19 NA – Georgia votes to secede
1861/01/26 NA – Louisiana votes to secede
1861/01/29 SH – Kansas
1861/02/01 NA – Texas votes to secede
1861/03/02 AP – Unratified slavery amendment
1861/03/04 PR – Abraham Lincoln
1861/03/11 NA – Confederate Constitution ratified
1861/04/12 WR – Civil War begins (Fort Sumter)
1861/04/17 NA – Virginia votes to secede
1861/05/06 NA – Arkansas votes to secede
1861/05/20 NA – North Carolina votes to secede
1861/06/08 NA – Tennessee votes to secede
1861/10/31 NA – Missouri faction votes to secede
1861/11/20 NA – Kentucky faction votes to secede
1863/06/20 SH – West Virginia
1864/10/31 SH – Nevada
1865/01/31 AP – Amendment 13 ((Nobility/BAR, must be registered as foreign agents ??)) (LOOK for Const. of USA v. Const. for the USA, clam two different const.)
1865/03/04 PR – Abraham Lincoln
1865/04/08 WR – Civil War ends (Lee surrenders to Grant)
1865/04/15 PR – Andrew Johnson (following death of Lincoln)
1865/12/06 AR – Amendment 13
1866/06/13 AP – Amendment 14
1866/07/24 NA – Tennessee readmitted to the Union
1867/03/01 SH – Nebraska
1868/02/24 NA – House impeaches President Johnson
1868/05/16 NA – Senate acquits President Johnson
1868/06/22 NA – Arkansas readmitted to the Union
1868/06/25 NA – Florida readmitted to the Union
1868/07/04 NA – North Carolina readmitted to the Union
1868/07/09 NA – South Carolina readmitted to the Union
1868/07/09 NA – Louisiana readmitted to the Union
1868/07/09 AR – Amendment 14
1868/07/13 NA – Alabama readmitted to the Union
1869/02/26 AP – Amendment 15
1869/03/04 PR – Ulysses Grant
1870/01/26 NA – Viginia readmitted to the Union
1870/02/03 AR – Amendment 15
1870/02/23 NA – Mississippi readmitted to the Union
1870/03/30 NA – Texas readmitted to the Union
1870/07/15 NA – Georgia readmitted to the Union
1871/10/08 NA – Great Chicago Fire
1873/03/04 PR – Ulysses Grant
1876/08/01 SH – Colorado
1877/01 NW – Russo-Turkish War begins
1877/03/03 PR – Rutherford Hayes
1878/06 NW – Russo-Turkish War end (Treaty of San Stefano)
1881/03/04 PR – James Garfield
1881/09/19 PR – Chester Arthur (following death of Garfield)
1885/03/04 PR – Grover Cleveland
1889/03/04 PR – Benjamin Harrison
1889/11/02 SH – North Dakota
1889/11/02 SH – South Dakota
1889/11/08 SH – Montana
1889/11/11 SH – Washington
1890/07/03 SH – Idaho
1890/07/10 SH – Wyoming
1893/03/04 PR – Grover Cleveland
1893/06/27 NA – Stock market crash
1896/01/04 SH – Utah
1897/03/04 PR – William McKinley
1898/04/21 WR – Spanish-American War begins
1898/12/10 WR – Spanish-American War ends (Treaty of Paris)
1898/12/10 NA – Guam, Puerto Rico ceded by Spain
1899/02/04 WR – Philippine-American War begins
1899/10/12 NW – Boer War begins
1901/03/04 PR – William McKinley
1901/09/14 PR – Theodore Roosevelt (following death of McKinley)
1902/05/31 NW – Boer War ends
1902/07/04 WR – Philippine-American War ends
1904/02/08 NW – Russo-Japanese War begins
1905/03/04 PR – Theodore Roosevelt
1905/09/05 NW – Russo-Japanese War ends
1906/04/18 NA – Great San Francisco Earthquake
1907/03/13 NA – Stock market crash
1907/11/16 SH – Oklahoma
1909/03/04 PR – William Taft
1909/07/12 AP – Amendment 16
1912/01/06 SH – New Mexico
1912/02/14 SH – Arizona
1912/02/12 NW – End of China’s Qing Dynasty
1912/04/15 NW – Titanic sinks
1912/05/13 AP – Amendment 17
1913/02/03 AR – Amendment 16
1913/03/04 PR – Woodrow Wilson
1913/04/08 AR – Amendment 17
1913/10/10 NW – Panama Canal completed
1914/06/28 NW – Archduke Ferdinand assassinated, setting off WWI
1917/03/04 PR – Woodrow Wilson
1917/03/15 NW – The Tsar of Russia abdicates
1917/03/31 NA – U.S. purchases the Virgin Islands from Denmark
1917/12/18 AP – Amendment 18
1918/04/02 WR – United States joins WWI
1919/01/16 AR – Amendment 18
1919/06/04 AP – Amendment 19
1919/06/28 WR – WWI officially ends (Treaty of Versailles)
1920/08/18 AR – Amendment 19
1921/03/04 PR – Warren Harding
1923/08/02 PR – Calvin Coolidge (following death of Harding)
1925/03/04 PR – Calvin Coolidge
1926/06/02 AP – Unratified child labor amendment
1929/03/04 PR – Herbert Hoover
1929/10/29 NA – Stock market crash
1932/03/02 AP – Amendment 20
1933/01/23 AR – Amendment 20
1933/02/20 AP – Amendment 21
1933/03/04 PR – Franklin Roosevelt
1933/12/05 AR – Amendment 21
1936/07/18 NW – Spanish Civil War
1937/01/20 PR – Franklin Roosevelt
1939/09/03 NW – WWII begins
1941/01/20 PR – Franklin Roosevelt
1941/12/11 WR – United States joins WWII
1945/01/20 PR – Franklin Roosevelt
1945/04/12 PR – Harry Truman (following death of Roosevelt)
1945/09/02 WR – WWII ends
1946/01/10 NW – First meeting of the UN
1947/03/21 AP – Amendment 22
1947/08/15 NW – Indian and Pakistani Independence
1949/01/20 PR – Harry Truman
1949/10/01 NW – Communist China established
1950/06/25 WR – Korean War begins
1951/02/27 AR – Amendment 22
1953/01/20 PR – Dwight Eisenhower
1953/07/27 WR – Korean War ends
1957/01/21 PR – Dwight Eisenhower
1957/10/04 NW – USSR launches Sputnik
1959/01/03 SH – Alaska
1959/08/21 SH – Hawaii
1960/06/17 AP – Amendment 23
1961/01/20 PR – John Kennedy
1961/04/17 NW – Bay of Pigs invasion
1961/03/29 AR – Amendment 23
1962/08/27 AP – Amendment 24
1962/10Â Â Â NA – Cuban Missile Crisis
1963/11/22 PR – Lyndon Johnson (following death of Kennedy)
1964/01/23 AR – Amendment 24
1964/08/07 WR – Vietnam War begins (Gulf of Tonkin Resolution)
1965/01/20 PR – Lyndon Johnson
1965/07/06 AP – Amendment 25
1967/02/10 AR – Amendment 25
1969/01/20 PR – Richard Nixon
1971/03/23 AP – Amendment 26
1971/07/01 AR – Amendment 26
1972/03/22 AP – Unratified equal rights amendment
1973/01/20 PR – Richard Nixon
1973/03/29 WR – Vietnam War ends (last U.S. troops leave Vietnam)
1974/08/09 PR – Gerald Ford (following resignation of Nixon)
1977/01/20 PR – Jimmy Carter
1978/08/22 AP – Unratified D.C. voting rights amendment
1979/11/04 NW – Iranian militants seize U.S. embassy
1981/01/20 PR – Ronald Reagan
1982/06/30 NA – Unratified equal rights amendment expires
1985/01/20 PR – Ronald Reagan
1985/08/22 NA – Unratified D.C. voting rights amendment expires
1989/01/20 PR – George H. W. Bush
1990/10/03 NW – Reunification of Germany
1991/01/17 WR – Gulf War begins
1991/02/27 WR – Gulf War ends
1992/01/01 NW – USSR dissolved
1992/05/07 AR – Amendment 27
1993/01/20 PR – William Clinton
1997/01/20 PR – William Clinton
1998/12/19 NA – House impeaches President Clinton
1999/02/12 NA – Senate acquits President Clinton
1999/03/24 WR – Kosovo Conflict begins
1999/06/10 WR – Kosovo Conflict ends
2001/01/20 PR – George W. Bush
2001/09/11 NA – Terrorists attack New York and Washington D.C.
2001/09/14 WR – Congress authorizes use of force for war on terrorism
2003/03/19 WR – Iraq War begins
2005/01/20 PR – George W. Bush
2009/01/20 PR – Barack Obama
2010/08/31 WR – Iraq War ends
