St. Gregory the Enlightener Church of White Plains, NY, will hold its 16th annual “Lionel Galstaun Memorial Concert” on Sunday, Apr. 8, at 1:30 p.m., featuring Vartan Gabrielian (bass baritone) and Vatche Jambazian (piano), at the church (1131 North St., White Plains). For information, click here to view a flyer.