This trumpeter was born May 26, 1926; you could call it the "birth of the Cool"
The liner notes 
of the first recordings of the Davis Quintet for Columbia Records call it one of... [DOC] [TLE] Miles Davis Discography at Discogs [PAR] Trumpeter, bandleader, composer, and one of the most important figures in jazz 
... Born: 26 May 1926 in Alton, Illinois, USA.