To illustrate the depth one can access in our collections, we have compiled relevant archival imagery to frame a diverse cultural, political and chronological retrospective of noteworthy anniversaries. Be sure to bookmark this section as the calendar is a work in progress and will continue to expand.
| December | Year | Anniversary | Event |
| 1 | 1971 | 37th | The war in Cambodia worsens, as Cambodian troops lock in a doomed fight with the Khmer Rouge and their North Vietnamese allies. |
| 1 | 1862 | 146th | Ten weeks after his Emancipation Proclamation, Lincoln's State of the Union Address advocates moderation in slavery policy. |
| 2 | 1881 | 127th | Pauline Canissa, a U.S. opera singer, attempts to sing at a benefit in honor of the late Pres. Garfield, but breaks down |
| 2 | 1961 | 47th | Fidel Castro announces he is a Marxist-Leninist and will lead Cuba to Communism. |
| 2 | 1892 | 116th | Jay Gould, unscrupulous U.S. financier who joined Daniel Drew to fight with Cornelius Vanderbilt over the railroads, dies. |
| 2 | 1917 | 91st | Led by Vladimir Lenin, the Bolsheviks arrange an armistice with the Central Powers and withdraw from war. |
| 3 | 1776 | 232nd | George Washington arrives at the banks of the Delaware River during the Revolutionary War. |
| 3 | 1826 | 182nd | Birth of George McClellan, Union general whom Lincoln promoted to Commander in Chief and then soon demoted |
| 4 | 1816 | 192nd | James Monroe becomes the 5th president of the United States. |
| 4 | 1861 | 147th | Lillian Russell (Helen Louise Leonard), American vocalist and actress, is born. |
| 4 | 1892 | 116th | Francisco Franco, Spanish dictator, is born. |
| 4 | 1942 | 66th | FDR orders that the Works Progress Administration - which provided jobs during the Depression - be dismantled. |
| 5 | 1791 | 217th | Wolfgang Amadeus Mozart, Austrian composer, dies. |
| 5 | 1831 | 177th | John Quincy Adams, former U.S. president, becomes a member of the House of Representatives. |
| 5 | 1876 | 132nd | President Ulysses S. Grant apologizes to Congress for mistakes he made while president. |
| 5 | 1782 | 226th | Martin Van Buren, 8th U.S. president and first president born in the United States as a citizen, is born. |
| 5 | 1792 | 216th | George Washington is re-elected president and John Adams is re-elected vice president. |
| 6 | 1941 | 67th | A day before Pearl Harbor, Pres. Franklin Roosevelt asks Hirohito to "prevent further death and destruction," but to no avail. |
| 6 | 1492 | 516th | Christopher Columbus lands on the island of Santo Domingo. |
| 6 | 1877 | 131st | Edison makes his first sound recording, "Mary Had a Little Lamb," on his newest invention, the phonograph. |
| 6 | 1917 | 91st | The Bolsheviks imprison Czar Nicholas II and his family in Tobolsk. |
| 7 | 1796 | 212nd | John Adams is elected the second U.S. president. |
| 7 | 1836 | 172nd | Martin Van Buren is elected the eighth president of the U.S. |
| 7 | 1916 | 92nd | David Lloyd George becomes prime minister of Britain. |
| 7 | 1941 | 67th | Japan attacks the U.S. Pacific fleet home base at Pearl Harbor in Hawaii. |
| 7 | 1862 | 146th | At Prairie Grove, AR, Union Gen. Herron's swift march with 7,000 troops helps Gen. James Blunt hold off Conf. Gen. Hindman. |
| 7 | 1987 | 21st | Soviet leader Mikhail Gorbachev arrives in the U.S. for a summit meeting with Reagan. |
| 8 | 1776 | 232nd | General Washington retreats across the Delaware River, from New Jersey to Pennsylvania, to flee the British |
| 8 | 1886 | 122nd | The American Federation of Labor or AFL is born in Columbus, Ohio. |
| 8 | 1941 | 67th | The U.S. enters World War II, as Congress declares war on Japan. |
| 8 | 1542 | 466th | Mary Stuart, Queen of Scots, is born on this day. |
| 8 | 1987 | 21st | Gorbachev and Reagan sign the first treaty between two world powers to reduce their arsenals of nuclear weapons. |
| 9 | 1621 | 387th | The first sermon in New England is delivered at Plymouth, Massachusetts. |
| 9 | 1641 | 367th | Anthony Van Dyck, Flemish painter, is born today. |
| 9 | 1861 | 147th | The Joint Committee on the Conduct of the War forms to monitor Lincoln's Administration after the Battle of Ball's Bluff. |
| 9 | 1847 | 161st | George Grossmith, English actor, is born. |
| 9 | 1862 | 146th | Captured Confederate officer Benjamin Carter is incarcerated in Rock Island Union Army Prison, in Illinois. |
| 9 | 1982 | 26th | Leon Jaworski, special prosecutor in the Watergate scandal, dies. |
| 10 | 1906 | 102nd | Pres. Theodore Roosevelt is the first American to win the Nobel Peace Prize, for his mediation efforts in the Russo-Japanese War. |
| 10 | 1931 | 77th | Jane Addams is the first U.S. woman to be awarded the Nobel Peace Prize for her work with the poor. |
| 10 | 1817 | 191st | Mississippi is admitted as the 20th state in the Union. |
| 10 | 1872 | 136th | P. B. S. Pinchback of Louisiana becomes the first African American governor of a U.S. state. |
| 10 | 1917 | 91st | The International Red Cross, founded in 1863 by Henri Dunant of Switzerland, receives the Nobel Peace Prize. |
| 10 | 2002 | 6th | Former president Jimmy Carter accepts the Nobel Peace Prize for his diplomatic efforts in the Middle East during the 1970s. |
| 11 | 1781 | 227th | Sir David Brewster, Scottish physicist, inventor, and writer, is born. |
| 11 | 1941 | 67th | Germany and Italy declare war on the U.S. |
| 11 | 1961 | 47th | Pres. Kennedy orders helicopter crewmen to South Vietnam to provide training for South Vietnamese forces. |
| 11 | 1777 | 231st | The British delay General George Washington's march to his winter camp in Valley Forge. |
| 11 | 1792 | 216th | Louis XVI goes before the revolutionary Convention to face charges of treason. |
| 11 | 1862 | 146th | The Union Army occupies Fredericksburg, Virginia. |
| 11 | 1872 | 136th | Buffalo Bill Cody makes his first stage appearance. |
| 12 | 1806 | 202nd | Stand Watie, Cherokee chief and Confederate general of the Cherokee Cavalry, is born. |
| 12 | 1901 | 107th | Nobel-prize winner Guglielmo Marconi sends the first wireless signal, from Great Britain to Newfoundland. |
| 12 | 1896 | 112nd | Guglielmo Marconi, Italian physicist, gives the world's first public demonstration of radio in London. |
| 12 | 1947 | 61st | The United Mine Workers Union withdraws from the American Federation of Labor. |
| 13 | 1991 | 17th | North Korea and South Korea sign a peace treaty, ending the Korean War, 38 years after the fighting stopped. |
| 13 | 1776 | 232nd | Gen. Charles Lee, fond of women and wine, abandons his Patriot troops to go to Widow White's tavern in New Jersey |
| 13 | 1862 | 146th | Lee's vastly outnumbered Confederate troops defeat Burnside from their position on Marye's Heights at the battle of Fredericksburg. |
| 14 | 1861 | 147th | Prince Albert, husband of Queen Victoria, dies in London. |
| 14 | 1961 | 47th | Pres. Kennedy steps up U.S. involvement with South Vietnam. |
| 14 | 1897 | 111st | Politician Margaret Chase Smith, first U.S. woman elected to both the House of Representatives and the Senate, born. |
| 15 | 1791 | 217th | The Bill of Rights goes into effect when it is ratified by Virginia on this day |
| 15 | 1831 | 177th | Franklin Sanborn, U.S. social reformer, abolitionist, and journalist, is born. |
| 15 | 1916 | 92nd | The French defeat the Germans at the Battle of Verdun, in WWI |
| 15 | 1961 | 47th | Nazi official Adolf Eichmann is sentenced to death by an Israeli court. |
| 15 | 1832 | 176th | Alexandre Gustave Eiffel, French engineer who designed the Eiffel Tower in Paris, is born. |
| 16 | 1961 | 47th | Young Pres. Kennedy begins his South American tour to enthusiastic cheers in Caracas, Venezuela. |
| 17 | 1991 | 17th | Boris Yeltsin's supporters declare the Soviet Union will cease to exist. |
| 17 | 1797 | 211st | Joseph Henry, eminent U.S. physicist and first secretary of the Smithsonian Institute, born. |
| 17 | 1807 | 201st | John Greenleaf Whittier, U.S. poet and abolitionist, founder of the Liberal Party, born. |
| 17 | 1862 | 146th | Ulysses S. Grant expels the Jews from his Department when he learns that friends of his father's are cotton speculators. |
| 18 | 1886 | 122nd | Ty Cobb, U.S. baseball star and first man elected to the Baseball Hall of Fame, is born. |
| 18 | 1886 | 122nd | The Battle of Verdun, in France, ends. |
| 18 | 1956 | 52nd | Japan is admitted to the United Nations. |
| 18 | 1862 | 146th | At the Battle of Lexington, Nathan Forrest, ordered by Bragg to cut Union supplies, routs Robert Ingersoll's forces in Union territory. |
| 18 | 1892 | 116th | Tchaikovsky's "Nutcracker Ballet" is first performed, by the Russian Imperial Ballet. |
| 19 | 1941 | 67th | Hitler takes charge of the German army. |
| 19 | 1776 | 232nd | Anglo-American political theorist Thomas Paine publishes "American Crisis", which says: "These are the times that try men's souls." |
| 19 | 1732 | 276th | Benjamin Franklin begins publishing "Poor Richard's Almanack." |
| 19 | 1777 | 231st | Gen. Washington leads his army of 11,000 to Valley Forge for the winter, during which nearly 3,000 troops die. |
| 19 | 1817 | 191st | James J. Archer, Confederate brigadier general captured at Gettysburg and imprisoned on Johnson's Island, Ohio, is born |
| 19 | 1842 | 166th | Hawaii's sovereign independence is recognized by the U.S. |
| 20 | 1881 | 127th | Branch Rickey, the U.S. baseball executive who will hire the first black players, is born. |
| 20 | 1862 | 146th | In a raid on Holly Springs, MS, Van Dorn attacks Union supply lines in order to thwart Grant's efforts to capture Vicksburg. |
| 21 | 1811 | 197th | Archibald Campbell Tait, Archbishop of Canterbury, is born. |
| 21 | 1861 | 147th | President Lincoln signs into law a Navy medal, the Medal of Valor. |
| 21 | 1861 | 147th | The Trent Affair escalates during the Civil War and England nearly goes to war with the U.S. |
| 22 | 1941 | 67th | British Prime Minister Churchill arrives in Washington to confer with Pres. Franklin Roosevelt at the Arcadia Conference. |
| 22 | 1807 | 201st | Jefferson's Embargo Act, designed to force peace between Britain and France as well as keep the US out of their war, is passed. |
| 23 | 1921 | 87th | Pres. Warren Harding frees socialist Eugene Debs and other political prisoners. |
| 23 | 1862 | 146th | Confederate president Jefferson Davis declares Union Gen. Butler a felon for harassing the women of New Orleans. |
| 24 | 1851 | 157th | The Library of Congress is ravaged by fire, two thirds of its collection destroyed. |
| 24 | 1871 | 137th | Giuseppe Verdi's opera "Aida" premieres in Cairo, Egypt, for the opening of the Suez Canal. |
| 24 | 1822 | 186th | Matthew Arnold, British poet and essayist, born. |
| 24 | 1972 | 36th | Comedian Bob Hope gives his last show to entertain U.S. troops in Vietnam. |
| 25 | 336 | 1672nd | The first known Christmas celebrated on Dec. 25, in Rome, is set on the birthday of the sun god, Mithras. |
| 25 | 1776 | 232nd | General Washington and his troops crossed the Delaware River to surprise the Hessian forces in New Jersey. |
| 25 | 1821 | 187th | Clara Barton, founder of the American Red Cross, is born in Oxford, Massachusetts. |
| 25 | 1926 | 82nd | Hirohito becomes emperor of Japan. |
| 25 | 1991 | 17th | Soviet President Mikhail Gorbachev announces his resignation. |
| 25 | 1862 | 146th | Lt. Elisha Rhodes, one of the most famous Civil War diarists, writes in his journal, "I should like to be home this Christmas night." |
| 25 | 1977 | 31st | Charlie Chaplin, English-born comedian, actor, director and producer, dies at age 88. |
| 26 | 1776 | 232nd | The British suffer a major defeat at the Battle of Trenton during the Revolutionary War. |
| 26 | 1791 | 217th | Charles Babbage, British mathematician and inventor, born. |
| 26 | 1861 | 147th | Mason and Slidell are freed from their Boston jail, in exchange for Union prisoners of war, in the Trent Affair |
| 26 | 1941 | 67th | Winston Churchill is the first British prime minister to address the U.S. Congress. |
| 26 | 1492 | 516th | Columbus establishes the first Spanish settlement in the Americas, on the island of Haiti. |
| 26 | 1837 | 171st | Admiral George Dewey, U.S. naval commander, is born. |
| 26 | 1972 | 36th | Harry S. Truman, 33rd U.S. president, dies. |
| 27 | 1831 | 177th | Naturalist Charles Darwin sets out from England for a 5-year survey of the Atlantic and Pacific Oceans aboard the HMS Beagle. |
| 27 | 1822 | 186th | Louis Pasteur, French scientist who developed pasteurization as well as a rabies vaccination, is born. |
| 28 | 1856 | 152nd | Woodrow Wilson, 28th president of the U.S., is born in Staunton, VA. |
| 28 | 1832 | 176th | John Calhoun becomes the first US vice president to resign, due to differences with Pres. Andrew Jackson. |
| 29 | 1986 | 22nd | Former British Prime Minister Harold Macmillan dies at age 92. |
| 29 | 1851 | 157th | The first U.S. branch of the YMCA (Young Men's Christian Association) is established in Boston. |
| 29 | 1607 | 401st | Chief Powhatan spares John Smith's life because of the pleas of his daughter, Pocahontas. |
| 29 | 1837 | 171st | Canadian militiamen destroy the Caroline, a US steamboat docked at Buffalo, NY. |
| 29 | 1862 | 146th | At Chickasaw Bluffs, 6,000 Confederates defeat 37,000 Union troops, thwarting Union Gen. Sherman's attempt to take Vicksburg. |
| 30 | 1816 | 192nd | Poet Percy Bysshe Shelley and novelist Mary Wollstonecraft Godwin marry |
| 30 | 1916 | 92nd | Grigory Rasputin, Russian mystic and favorite of Czar Nicholas II, is murdered by a group of Russian nobles. |
| 30 | 1862 | 146th | The Union ironclad USS Monitor sinks off Cape Hatteras. |
| 30 | 1922 | 86th | Lenin proclaims the establishment of the USSR. |
| 31 | 1946 | 62nd | President Harry S. Truman declares World War II officially over. |
| 31 | 1781 | 227th | America's first modern bank, the Bank of North America, opens in Philadelphia, as conceptualized by Robert Morris |
| 31 | 1961 | 47th | America's Marshall Plan ends, after distributing more than $12 billion in foreign aid since 1948. |
| 31 | 1862 | 146th | At Parker's Crossroads, Nathan Forrest barely escapes capture but his raid forces Grant to give up on capturing Vicksburg. |
| 31 | 1862 | 146th | At the Battle of Stones River, Rosecrans and Bragg begin a fight in the bitter cold that will last 3 days before a Union victory. |
| 31 | 1897 | 111st | Brooklyn's last day as a separate entity from New York City, before becoming a borough. |