December is a big month for birthdays, including Dave Bartholomew, who will be 100 years old on December 24, and Henry Roeland “Professor Longhair” Byrd, who was born 100 years ago on December 19, 1918.

Bassist George Porter Jr. turns 71 on December 26, and Roselyn Leonard, one-half of the New Orleans busker husband-and-wife musician team of David and Roselyn, will celebrate 80 years on the planet on December 26 as well...