March 31

On This Day In History
	1889: Eiffel Tower opened to public The 984-foot (300-metre) Eiffel Tower, a wrought iron technological masterpiece created by Gustave Eiffel to commemorate the French Revolution, was opened to the public at the Centennial Exposition in Paris this day in 1889.
Eiffel Tower, Paris
Biography Of The Day
	René Descartes René Descartes, born this day in 1596 and perhaps best known for the famous phrase “I think, therefore I am, was a French mathematician, scientist, and philosopher who has often been called the father of modern philosophy.
René Descartes, lithograph, 19th century.
More Events On This Day In History
	1980 American track-and-field legend Jesse Owens died in Phoenix, Arizona.
1918	1918 Clocks in the United States were set one hour ahead as daylight saving time went into operation for the first time.
1870	1870 Thomas Peterson-Mundy of Perth Amboy, New Jersey, became the first African American to vote under the Fifteenth Amendment to the U.S. Constitution.
	1854 U.S. Commodore Matthew Perry signed the Treaty of Kanagawa in Japan, ending that country's period of seclusion.
1732	1732 Composer Joseph Haydn was born in Rohrau, Austria.
1521	1521 The first Roman Catholic mass in the Philippines was celebrated on the island of Limasawa.