| Significant Event | Day of Week it Occurred |
| Assassination of John F. Kennedy | |
| End of Iran Hostage Crisis | |
| 1st Day of Woodstock | |
| D-Day Invasion of Normandy | |
| Assassination of Robert F. Kennedy | |
| Signing of the U.S. Declaration of Independence | |
| Chernobyl Nuclear Accident | |
| Hurricane Katrina | |
| Fall of Berlin Wall | |
| Osama Bin Laden Killed | |
| San Francisco Earthquake | |
| | Significant Event | Day of Week it Occurred |
| Japan Earthquake, Tsunami, Fukushima Disaster | |
| Assassination of Martin Luther King | |
| Assassination of Lincoln | |
| Space Shuttle Challenger Disaster | |
| WWII Begins with Nazi Invasion of Poland | |
| 9/11 Terrorist Attacks | |
| Beatles 1st Appearance on Ed Sullivan Show | |
| Bombing of Hiroshima | |
| Bombing of Pearl Harbor | |
| Sinking of the Titanic | |
| 1st Man on the Moon | |
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