April 1st
- 1621: The Pilgrims And Wampanoag Make Peace
- 1700: April Fools' Tradition Begins
- 1945: The Battle Of Okinawa Begins
- 1984: Marvin Gaye Is Murdered
- 2006: Brian Shaffer Goes Missing
April 2nd
- 1502: Arthur Prince Of Wales Dies
- 1513: Juan Ponce de León Claims Florida For Spain
- 1805: Hans Christian Andersen Is Born
- 1917: Woodrow Wilson Asks Congress To Declare War On Germany
- 1932: Famed Cowboy Bill Pickett Dies
- 1982: Argentina Invades The Falkland Islands
April 3rd
- 33 C.E.: Jesus Christ Is Crucified
- 1860: The Pony Express Begins
- 1882: Jesse James Is Murdered
- 1968: Martin Luther King Delivers 'I've Been To The Mountaintop' Speech
- 1973: The First Cell Phone Call Is Made
- 1996: The 'Unabomber' Is Arrested
April 4th
- 1841: William Henry Harrison Dies
- 1928: Maya Angelou Is Born
- 1958: Cheryl Crane Stabs Johnny Stompanato To Death
- 1968: Martin Luther King Jr. Is Assassinated
- 1973: The World Trade Center Opens In New York
April 5th
- 1614: Pocahontas Weds John Rolfe
- 1764: Britain Passes The Sugar Act In The American Colonies
- 1859: Charles Darwin Sends His Publishers The First Chapters Of On the Origin of Species
- 1955: Winston Churchill Steps Down
- 1994: Kurt Cobain Dies
April 6th
- 1453: The Siege Of Constantinople Begins
- 1830: Joseph Smith Founds The Church Of Jesus Christ Of Latter-Day Saints
- 1896: The First Modern Olympic Games Begin
- 1917: The United States Enters World War I
- 1931: Ram Dass Is Born
- 1955: Keith Hunter Jesperson Is Born
- 1994: The Rwandan Genocide Begins
April 7th
- 1803: Toussaint L'Ouverture Dies
- 1915: Billie Holiday Is Born
- 1963: Josip Broz Tito Declared President Of Yugoslavia For Life
- 1972: Joe Gallo Is Murdered
- 1987: The Chippendales Murders Begin
- 1994: The Rwandan Genocide Begins
April 8th
- 563 B.C.E.: Gautama Buddha Is Born
- 1730: The First Synagogue Is Dedicated In New York
- 1820: French Navy Officer Witnesses The Discovery Of The Venus de Milo in Melos
- 1989: Felix Gallardo Is Arrested
- 1990: Ryan White Dies Of AIDS
- 1994: Kurt Cobain Is Found Dead
- 2009: Somali Pirates Attack Maersk Alabama
April 9th
- 1835: King Leopold II Of Belgium Is Born
- 1865: Robert E. Lee Surrenders To Ulysses S. Grant
- 1881: Billy The Kid Is Found Guilty Of Murder
- 1942: Bataan Death March Begins
- 2003: Baghdad Falls To U.S. Forces
April 10th
- 837 C.E.: Halley's Comet Makes Closest Ever Pass By Earth
- 1815: Mount Tambora Erupts
- 1845: The Great Fire Of Pittsburgh
- 1866: ASPCA Is Founded
- 1912: The RMS Titanic Sets Sail
- 1919: Emiliano Zapata Is Assassinated
- 1970: The Beatles Break Up
- 1981: The Brixton Riots Begin
April 11th
- 1814: Napoleon Bonaparte Is Exiled To Elba
- 1890: Joseph Merrick Dies
- 1921: The First Live Sporting Event Is Broadcast Over Radio
- 1974: Wayne Nance Kills His First Victim
- 1979: Ugandan Dictator Idi Amin Is Overthrown
- 1981: Keddie Cabin Murders Are Committed
April 12th
- 1633: Galileo Galilei Is Accused Of Heresy
- 1861: The American Civil War Begins At Fort Sumter
- 1927: The Shanghai Massacre Begins
- 1945: Franklin D. Roosevelt Dies
- 1961: Yuri Gagarin Becomes The First Man In Space
April 13th
- 1612: Miyamoto Musashi Defeats Sasaki Kojiro
- 1743: Thomas Jefferson Is Born
- 1866: Butch Cassidy Is Born
- 1870: The Metropolitan Museum Of Art Is Established
- 1919: The Amritsar Massacre Takes Place
- 1970: An Oxygen Tank Explodes On Apollo 13
- 1997: Tiger Woods Wins His First Masters Tournament
April 14th
- 1818: Webster's American Dictionary Is First Printed
- 1865: Abraham Lincoln Is Shot By John Wilkes Booth
- 1910: William Howard Taft Throws Out The Ceremonial First Pitch
- 1912: The RMS Titanic Hits An Iceberg
- 1935: The 'Black Sunday' Dust Bowl Storm Takes Place
- 2014: Boko Haram Kidnaps 275 Girls From A Boarding School
April 15th
- 1848: Seventy-Seven Slaves Attempt To Escape In The 'Pearl Incident'
- 1865: Abraham Lincoln Dies
- 1865: Andrew Johnson Is Sworn In
- 1912: The RMS Titanic Sinks
- 1945: Bergen-Belsen Concentration Camp Is Liberated
- 1998: Pol Pot Dies
- 2019: Notre Dame Cathedral Catches On Fire
April 16th
- 1828: Francisco Goya Dies
- 1853: The First Passenger Railway In India Opens
- 1889: Charlie Chaplin Is Born
- 1917: Vladimir Lenin Returns To Russia From Exile
- 1943: Albert Hofman Accidentally Discovers LSD
- 2007: The Virginia Tech Shooting Takes Place
April 17th
- 1790: Benjamin Franklin Dies
- 1865: Mary Surratt Is Arrested
- 1895: The First Sino-Japanese War Ends
- 1961: The Bay Of Pigs Invasion Is Launched
- 1975: Cambodia Falls To The Khmer Rouge
April 18th
- 1775: Paul Revere Embarks On His 'Midnight Ride'
- 1894: Leonarda Cianciulli Is Born
- 1906: The Great San Francisco Earthquake Takes Place
- 1912: Survivors From The Titanic Arrive In NYC
- 1955: Albert Einstein Dies
- 1965: Grace Kelly Marries Prince Rainier
April 19th
- 1775: The American Revolution Begins
- 1824: Lord Byron Dies
- 1943: The Warsaw Ghetto Uprising Begins
- 1993: The Waco Siege Ends
- 1995: The Oklahoma City Bombing Takes Place
April 20th
- 1689: The Siege Of Derry Begins
- 1889: Adolf Hitler Is Born In Austria
- 1902: Marie And Pierre Curie Isolate Radium
- 1999: The Columbine School Shooting
- 2010: The Deepwater Horizon Oil Spill Takes Place
April 21st
- 753 B.C.E.: Rome Is Founded
- 1836: General Santa Anna Is Captured
- 1898: USS Maine Blows Up, Sparking The Spanish-American War
- 1910: Mark Twain Dies
- 1918: The "Red Baron" Is Killed
- 1934: "Proof" Of The Loch Ness Monster Is Published
- 2016: Prince Dies
- 2016: Michelle McNamara Dies
April 22nd
- 1519: Hernán Cortés Establishes Veracruz
- 1889: The Oklahoma Land Rush Begins
- 1915: German Forces Use Chlorine Gas For The First Time
- 1923: Bettie Page Is Born
- 1970: The Inaugural Earth Day Is Observed
- 1994: Richard Nixon Dies
April 23rd
- 1016: King Aethelred II Dies
- 1564: William Shakespeare Is Born
- 1661: Charles II Of England Is Crowned
- 1956: Elvis Presley Makes His Debut In Vegas
- 1968: Timothy McVeigh Is Born
- 1969: Sirhan Sirhan Receives The Death Penalty
- 2006: Jasmine Richardson Murders Her Parents
April 24th
- 1800: The Library Of Congress Is Established
- 1915: The Armenian Genocide Begins
- 1916: The Easter Rebellion Begins
- 1967: Vladimir Komarov Becomes First Man To Die In Space
- 2018: The 'Golden State Killer' Is Arrested
April 25th
- 1719: Robinson Crusoe Is Published
- 1792: The Guillotine Is Used For The First Time
- 1917: Ella Fitzgerald Is Born
- 1990: The Hubble Space Telescope Goes Into Orbit
- 2015: Kathmandu Earthquake Strikes
April 26th
- 1777: The 'Female Paul Revere' Rides From New York To Connecticut
- 1865: John Wilkes Booth Is Killed
- 1886: Ma Rainey Is Born
- 1933: Hermann Göring Creates The Gestapo
- 1952: The 'Grauballe Man' Is Discovered
- 1977: Studio 54 Opens In New York City
- 1986: The Chernobyl Disaster Takes Place
- 1989: The World's Deadliest Known Tornado Hits Bangladesh
April 27th
- 1521: Ferdinand Magellan Is Killed
- 1667: John Milton Sells Paradise Lost
- 1865: The Sultana Explodes
- 1997: Andrew Cunanan Begins Killing Spree
- 2007: The Tomb Of Herod The Great Is Discovered
April 28th
- 357 C.E. Emperor Constantius II Arrives In Rome
- 1945: Benito Mussolini Is Executed
- 1978: Afghan President Daoud Is Overthrown
- 1996: The Port Arthur Massacre Begins
- 1996: Bill McGuire, Husband Of The "Suitcase Killer," Goes Missing/h2>
Bill McGuire goes missing from Woodbridge Township, New Jersey. A month later, suitcases containing human body parts appeared in the Chesapeake Bay, prompting police to launch a criminal investigation. Police determined that the remains belonged to Bill McGuire, and they went to interview his wife, Melanie. His wife stated that they had fought the night he went missing, and that he decided to walk out and never return. Forensic evidence would eventually show that Melanie drugged her husband, shot him, and then dismembered his body.
April 29th
- 1429: Joan Of Arc Arrives In Orleans
- 1863: William Randolph Hearst Is Born
- 1945: Adolf Hitler Marries Eva Braun
- 1992: The L.A. Riots Begin
- 2011: Prince William Marries Kate Kiddleton
April 30th
- 1803: The Louisiana Purchase Is Completed
- 1897: The Discovery Of Electrons Is Announced
- 1945: Adolf Hitler Dies By Suicide
- 1975: The 'Fall Of Saigon' Takes Place
- 1996: Anton Lavey Founds The Church Of Satan
