Event:
The ambassador from the People's Republic of China is summoned by Japan's government after a flotilla of Chinese ships sail near the disputed Senkaku Islands
More Notable Events on April 23:
1994 Libertarian party nominates Howard Stern for Governor of New York
1992 McDonald's opens its 1st fast-food restaurant in China
1984 AIDS-virus identified, acquired immune deficiency syndrome
1972 Apollo 16 astronauts explores Moon surface
1662 Connecticut chartered as an English colony