May 15th is celebrated as Straw Hat Day and Chocolate Chip Day.
Alabama passed the Human Life Protection Act, enacting a near-total ban on abortions.
The California Supreme Court ruled that the state ban on same-sex marriage was unconstitutional.
The 'Portrait of Dr. Gachet' by Vincent van Gogh was sold for $82.5 million in three minutes.
After being under US military authority, the island of Okinawa reverted back to Japanese control.
The USSR launched the Sputnik III.
The world's first Mcdonald's opened in San Bernardino, California.
The Moscow Metro was opened to the public.
Ellen Church became the first female airline stewardess aboard a Boeing Air Transport flight from San Francisco to Chicago.
Mickey Mouse appeared in his first cartoon.
The British Legion was formed to take care of veterans by giving financial, social, and emotional support to members and veterans of the British Armed Forces.
Las Vegas was officially founded.
Magnus Hirschfeld founded the Scientific-Humanitarian Committee in Berlin.
The US Department of Agriculture was created after being signed into legislation by President Abraham Lincoln.
