"A lot of D.C. people are transplants and may not get to go home for Christmas, so [the annual holiday concert] is our way of sharing some holiday cheer," DC's Different Drummers' artistic director Joe Bello told Metro Weekly last year. And this year's concert marks the 30th anniversary of the occasion, so chances are the milestone will make it extra-festive. DC Swing!, Sax in the City and other small ensembles perform at the concert, entitled "Good Things Come in Little Packages." Tomorrow, Sunday, Dec. 12, at 3 p.m. Lutheran Church of the Reformation, 212 East Capitol St. NE. Tickets are $20. Call 202-403-3669 or visit dcdd.org.