A Tsar is Born. The Hasty Pudding Theatricals' 147th production will run until March 21. Hasty Pudding Theater, 12 Holyoke St., 8 p.m. $23. Call the Hasty Pudding Box Office at 495-5205, Monday through Saturday, 2-6 p.m. for tickets.

Falsettos. By William Finn. Sanders Theatre, 8 p.m. Tickets are available at the Sanders Theatre Box Office at 496-2222 or at the door. $7.

Six Degrees of Separation. By John Guare. Loeb Experimental Theatre, 7:30 and 9:30 p.m. Free.

18 March Saturday

Concert

Harvard Wind Ensemble. Performs Gordon Jacob's "Celebration Overture" and other wind works. Sanders Theatre, 8 p.m. $4 for students. Call 496-BAND for more information.

The Harvard Group for New Music. Gregg Smith Singers. Paine Hall, 8 p.m. Free.

Dance

Annual Performance of Modern Dance. By the Harvard-Radcliffe Dance Company. Radcliffe Dance Center, 8 p.m. Friday and Saturday. $5.

Film

Harvard Film Archive. Carpenter Center for the Visual Arts. 24 Quincy St. 495-4700. $5 for students, unless a special event. "The Tourist and Burckhardt 2" at 3 p.m. An Evening with Robb Moss with Moss in person at 6:30 p.m. "Arizona Dream" at 8:45 p.m.

Movie

Strange Brew. Presented by the Harvard-Radcliffe Canadian Club. Science Center, 8 and 10 p.m. $3.

Opera

La Boheme. Lowell House Dining Hall, 8:30 p.m. $6 for students.