On this day (musically)

Into the world: Praetorius, William Henry Fry, Glazunov, Leo Fender, Giya Kancheli, Ronnie Spector, Ian Anderson, yours truly (in a year ending with a 7), and -- apparently -- The Standing Room. Happy birthday, TSR!
     non-musical bonus: the Smithsonian Institution, Angie Harmon

Out of the world: Michael Haydn, Bernd Alois Zimmermann, Conlon Nancarrow (10 years ago).
     non-musical bonus: the city of Nineveh, Rin Tin Tin

Other: oddly enough, on the same date 481 years apart, Magellan leaves port in Seville to circumnavigate the globe (1509), and the NASA space probe named for him lands on Venus to begin imaging its surface. Cool.

Thanks to wikipedia & Composers Datebook for the mix of interesting and worthless information.