Several historical events on the Ninth of August have made their mark in Toobworld in some way, either in being depicted in TV movies and mini-series, or by involving people who have been depicted in Toobworld.
Here are the ones that jumped out at me while perusing a list in Wikipedia:
1902 – Edward VII is crowned king of the United Kingdom.
1944 – The United States Forest Service and the Wartime Advertising Council release posters featuring Smokey Bear for the first time.
1945 – World War II: Nagasaki is devastated when an atomic bomb, "Fat Man", is dropped by the United States B-29 Bockscar. 70,000 people are killed instantly.
1969 – Members of a cult led by Charles Manson brutally murder pregnant actress Sharon Tate (wife of Roman Polanski), coffee heiress Abigail Folger, Polish actor Wojciech Frykowski, men's hairstylist Jay Sebring, and recent high-school graduate Steven Parent.
1974 – As a direct result of the Watergate scandal, Richard Nixon becomes the first President of the United States to resign from office. His Vice President, Gerald Ford, becomes president.
This video, although it took place the day before, sums up the resignation of Nixon: