| 1231-1808: |  | | | Papal Inquisition from before birth until age 21 |
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| 1478-1834: | |
| 1760-1820: | | | | Reign of King George III (Hanover) from before birth until age 33 |
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| 1787: | | | | Constitution is approved by the constitutional congress at age 0 |
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| 1787: | | | | Pennsylvania enters the union - 2nd at age 0 |
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| 1787: | | | | New Jersey enters the union - 3rd at age 0 |
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| 1787: | | | | Delaware enters the union - 1st at age 0 |
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| 1788: | | | | Maryland enters the union - 7th at age 1 |
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| 1788: | | | | New York enters the union - 11th at age 1 |
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| 1788: | | | | Georgia enters the union - 4th at age 1 |
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| 1788: | | | | New Hampshire enters the union - 9th at age 1 |
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| 1788: | | | | Virginia enters the union - 10th at age 1 |
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| 1788: | | | | South Carolina enters the union - 8th at age 1 |
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| 1788: | | | | Massachusetts enters the union - 6th at age 1 |
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| 1788: | | | | Connecticut enters the union - 5th at age 1 |
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| 1788: | | | | Constitution goes into effect at age 1 |
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| 1789: | | | | US Army Established at age 2 |
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| 1789: | | | | North Carolina enters the union - 12th at age 2 |
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| 1789-1796: | | | | George Washington selected 1st President from age 2 to age 9 |
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| 1790: | | | | Rhode Island enters the union - 13th at age 3 |
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| 1790: | | | | 1st official US census at age 3 |
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| 1790: | | | | Coast Guard Established at age 3 |
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| 1791: | | | | Vermont enters the union -14th at age 4 |
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| 1791: | | | | Federal Bill of rights adopted at age 4 |
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| 1792-1815: | | | | Napoleonic war from age 5 to age 28 |
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| 1792: | | | | Denmark 1st to forbid trade in slaves at age 5 |
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| 1792: | | | | Kentucky enters the union - 15th at age 5 |
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| 1793: | | | | Marie Antoinette beheaded at age 6 |
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| 1793: | | | | Eli Whitney invents Cotton Gin (increases need for slaves) at age 6 |
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| 1794: | | | | US Post Office Established at age 7 |
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| 1794: | | | | US Navy Established at age 7 |
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| 1794: | | | | Slavery abolished in French colonies at age 7 |
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| 1796: | | | | France's presses get right of free speech at age 9 |
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| 1796: | | | | Tennesee enters the union - 16th at age 9 |
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| 1796: | | | | Vaccination against Smallpox at age 9 |
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| 1796-1800: | | | | John Adams elected 2nd president of US from age 9 to age 13 |
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| 1798: | |
| 1798: | | | | US Marine Corps Established at age 11 |
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| 1798: | | | | Mississippi organized as a territory at age 11 |
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| 1798-1800: | | | | Undeclared war with France from age 11 to age 13 |
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| 1799: | | | | Rosetta Stone found at age 12 |
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| 1800: | | | | 1st Battery (Volta) at age 13 |
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| 1800: | | | | US capital moves from Philadelphia to Washington DC at age 13 |
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| 1800: | | | | Russia annexes Georgia at age 13 |
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| 1800-1809: | | | | Thomas Jefferson elected president of US from age 13 to age 22 |
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| 1802: | | | | Babylonian cuniform deciphered at age 15 |
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| 1803: | | | | Ohio enters the union - 17th at age 16 |
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| 1803: | | | | Fulton propels vessel by steampower at age 16 |
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| 1803: | | | | Louisiana Territory Purchased at age 16 |
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| 1804-1806: | | | | Lewis and Clark Expedition from age 17 to age 19 |
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| 1804: | | | | Haiti independent - 1st black country in West. Hemis. at age 17 |
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| 1805: | | | | Morphine isolated at age 18 |
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| 1805: | | | | Thomas Jefferson re-elected president of US at age 18 |
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| 1807: | | | | Robert Fulton makes 1st practical steamboat voyage at age 20 |
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| 1808: | | | | Pompeii excavation begins in earnest at age 21 |
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| 1808: | | | | Import of new slaves into US Is banned at age 21 |
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| 1809-1816: | | | | James Madison elected president of US from age 22 to age 29 |
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| 1809: | | | | Charles Darwin born at age 22 |
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| 1810: | | | | US pop. reaches 7.2 million at age 23 |
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| 1810: | | | | Homeopathy founded at age 23 |
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| 1812-1814: | | | | War of 1812 from age 25 to age 27 |
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| 1812: | | | | Louisiana enters the union - 18th at age 25 |
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| 1812: | | | | Missouri organized as a territory at age 25 |
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| 1815: | | | | Sumbawa volcano (Indonesia) erupts; 50,000 killed at age 28 |
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| 1815: | | | | French outlaw slavery in France at age 28 |
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| 1815: | | | | Battle of Waterloo at age 28 |
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| 1816: | | | | Indiana enters the union - 19th at age 29 |
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| 1816: | | | | Photographic Negative at age 29 |
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| 1816: | |
| 1817: | | | | Pentrich Revolution - England's last revolution at age 30 |
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| 1817: | | | | Alabama organized as a territory at age 30 |
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| 1817-1823: | | | | 1st Cholera pandemic from age 30 to age 36 |
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| 1817-1825: | | | | Erie canal constructed from age 30 to age 38 |
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| 1817: | | | | Mississippi enters the union - 20th at age 30 |
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| 1817-1824: | | | | James Monroe president of US from age 30 to age 37 |
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| 1818: | | | | Savannah 1st steamship to cross the Atlantic at age 31 |
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| 1818: | | | | Illinois enters the union - 21st at age 31 |
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| 1819: | | | | Alabama enters the union - 22nd at age 32 |
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| 1819: | | | | Oersted discovers electro-magnetism at age 32 |
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| 1819: | | | | Arkansas organized as a territory at age 32 |
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| 1820-1830: | | | | Reign of King George IV (Hanover) from age 33 until after line end |
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| 1820: | | | | Maine enters the union - 23rd at age 33 |
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| 1821: | | | | 1st US women's college at age 34 |
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| 1821-1829: | | | | Greek war of Independence from age 34 until after line end |
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| 1821: | | | | Missouri enters the union - 24th at age 34 |
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| 1821: | | | | US pop. reaches 9.2 million at age 34 |
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| 1822: | | | | Florida organized as a territory at age 35 |
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| 1824: | | | | Internal Combustion Engine at age 37 |
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| 1824-1828: | | | | John Quincy Adams president of US from age 37 until after line end |
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| 1824: | | | | Erie canal finished at age 37 |
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| 1826: | | | | 1st railroad tunnel (England) at age 39 |
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