As it happens there were two events of some importance on that day, both deaths, though the immediate reporting for many days, weeks, months and, it sometimes feels, even years, has concentrated on one: the assassination of President John F. Kennedy.
This blog refuses to go into any conspiracy theories, especially as most of them have been disproved by recent re-examination of the evidence, and would merely like to point out that the way political attitudes seemed to be one year before the election, Kennedy seemed reasonably certain to lose. Of course, many things could have happened.
However, there is no question that the assassination of the American President in broad daylight while he was being driven in an official motorcade, shocked the country and the world. It is fair to say that it was not Kennedy's presidency, which had its ups and downs, mostly downs, but his assassination that changed American politics though one hopes only temporarily.
The other event of that day was the death of C. S. Lewis, one of the best known children's writers, literary critics and popular Christian philosophers in the English-speaking world. His death was not dramatic but the outcome of a long illness and even longer refusal to look after himself properly.
This blog may have some reservations about Lewis's writings and even greater reservations about the sentimentalization of his life but has no doubts whatsoever that of the two men who died forty-eight years ago, he is the one whose name will continue to be honoured by people of all ages.
ADDENDUM: It has been pointed out to me that another important writer died on that day: Aldous Huxley of laryngeal cancer and, possibly, drug abuse in Los Angeles.
Add Aldous Huxley to your list, who died, same day, in Los Angeles.