Milan Rastislav Štefánik, Slovak astronomer, general, and politician (died 1919)

Milan Rastislav Štefánik was a Slovak politician, diplomat, aviator and astronomer. During World War I, he served at the same time as a general in the French Army and as Minister of War for Czechoslovakia. As one of the leading members of the Czechoslovak National Council, he contributed decisively to the cause of Czechoslovak sovereignty, since the status of Czech- and Slovak-populated territories was one of those in question until shortly before the disintegration of the Austro-Hungarian Empire, in 1918.

July 21 is the 202nd day of the year in the Gregorian calendar; 163 days remain until the end of the year.