I hope you’ll join me for music by Aaron Copland, Johann Nepomuk Hummel, Fanny Mendelssohn, and Leopold Mozart, on their birthday anniversaries (including Copland’s “Appalachian Spring,” in its original version for chamber ensemble of 13 instruments, on “Music from Marlboro”), today from 4 to 7 p.m. EST, on WWFM – The Classical Network and wwfm.org.