Edit: My birthday is May 9th, btw.
1955 - Sam and Friends debuts on a local US television channel, marking the first television appearance of both Jim Henson and what would become Kermit the Frog and the Muppets.
1994 - Nelson Mandela is inaugurated as South Africa's first black president.
1950 - L. Ron Hubbard publishes his book on Dianetics, entitled "Dianetics: The Modern Science of Mental Health. (auuuuuuugh!)
1671 - Thomas Blood, disguised as a clergyman, attempts to steal the Crown Jewels from the Tower of London. He is immediately caught because he is too drunk to run with the loot. He is later condemned to death and then mysteriously pardoned and exiled by King Charles II. (this one was too hilarious to pass up)
1960 - Reproductive rights: The U.S. Food and Drug Administration approves sale of the birth control pill.
1860 - J. M. Barrie, Scottish author (d. 1937) (author of Peter Pan)
1920 - Richard Adams, English author (author of Watership Down)
1986 - Tenzing Norgay, Nepalese sherpa (b. 1914) (first co-ascender of Mt. Everest/Sagarmatha)