
Aug 19: Birthday of Salamone Rossi (c. 1570–c. 1630).
Rossi's birthday is the shakiest one I'll post here, so let me explain the reasoning instead of just stating it.
No birth record survives for him. The date of August 19, 1570 comes from a piece of number-puzzle detective work: his first published collection, a set of canzonettas from 1589, contains exactly nineteen pieces, and the first letters of the first seven spell out VIVAT S R, "long live Salamone Rossi." Musicologist Don Harrán read the nineteen as a coded reference to Rossi's age at the time of publication, and worked backward to 1570. A more recent paper argues the acrostic instead marks a Jewish coming-of-age at twenty-five, which would put his birth in 1564 instead, so even the year isn't settled.
What's solid is the work itself. Rossi composed at the Gonzaga court in Mantua alongside Monteverdi, and wrote some of the earliest Hebrew-texted polyphony, settings of psalms for multiple voices collected as Hashirim asher li-Shlomo (The Songs of Solomon), along with early instrumental trio sonatas. He's thought to have died around 1630, possibly in the plague that followed the sack of Mantua, though that isn't fully certain either.
Music of Salamone Rossi (playlist): https://www.youtube.com/playlist?list=PL6-gAiQzhQYhq5wT18aIx1amtV8Hghfj6