April 4 - RCA Victor Records[?] announces that it will release all pop singles in mono and stereo simultaneously, the first record company to do so. Elvis Presley's single, "Stuck on You," is RCA's first mono/stereo release.
... founded Darién, oldest surviving European settlement in the Western Hemisphere
William Baffin, (1584-1622), explorer
Willem Barents, (1550?-1597), Dutch, died on ...