| First Event | Number of Days | Second Event |
| The 'unsinkable' Titanic departs on its maiden voyage | |
| Japan attacks Pearl Harbour | |
| Thomas Jefferson dies | |
| The Great Chicago Fire begins | |
| Apollo 11 is launched | |
| The US observes missile bases being built in Cuba | |
| Atomic bombing of Hiroshima | |
| William Henry Harrison is inaugarated as US president | |
| | First Event | Number of Days | Second Event |
| Sept 2nd. 1752 in the US and UK | |
| The USSR blocks road and rail access to West Berlin | |
| The Treaty of Ghent is signed officially ending the War of 1812 | |
| 53 Americans are taken hostage in Iran | |
| The beginning of the Waco siege | |
| Columbus departs from the Canary Islands on first voyage to the new world | |
| D-Day | |
|