A quodlibet is a piece of music which combines several different melodies in counterpoint, usually popular tunes, and often in a light-hearted manner. A very famous example of a quodlibet is at the end of Bach's Goldberg Variations. Another example is Galimathias Musicum, a 17 part quodlibet composed by Wolfgang Amadeus Mozart when he was about 10 years old.
... March 6 - Joseph Schmidt[?], tenor (+ 1942)
March 7 - Reinhard Heydrich, Nazi official
March 20 - B. F. Skinner, behavioral psychologist (+ 1990)
March 23 - ...