March 20 is the 79th day of the year. There are 286 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Friday or Sunday (58 in 400 years each) than on Wednesday or Thursday (57), and slightly less likely to occur on a Monday or Saturday (56). Typically the March equinox falls on this date, marking the vernal point in the Northern Hemisphere and the autumnal point in the Southern Hemisphere, when both day and night are of equal length.
+ 1854 – The Republican Party of the United States is organized in Ripon, Wisconsin.
+ 1915 – Albert Einstein publishes his general theory of relativity.
+ 1952 – The United States Senate ratifies a peace treaty with Japan.
+ 1906 – Ozzie Nelson, American actor and bandleader (d. 1975)
+ 1922 – Carl Reiner, American actor, director, producer, and screenwriter
+ 1931 – Hal Linden, American actor, singer, and director
+ 1937 – Jerry Reed, American singer-songwriter, guitarist, and actor (d. 2008)
+ 1945 – Pat Riley, American basketball player and coach
+ 1957 – Spike Lee, American actor, director, producer, and screenwriter