The Music in a Great Space series at Shadyside Presbyterian Church presents the Junior Mendelssohn Choir of Pittsburgh and the Pittsburgh Youth Symphony Orchestra at 4 p.m. The groups will perform Mozart's "Requiem." Tickets are $10-$20; 412-682-4300 or www.shadysidepres.org.
"Suite Life: A Billy Strayhorn Birthday Bash" will be held at the Kelly-Strayhorn Theater, 5941 Penn Ave., East Liberty, at 8 p.m. Jazz trumpeter Sean Jones leads the Pittsburgh Jazz Orchestra with vocalist Carolyn Perteete in a tribute to internationally acclaimed pianist, composer and KST namesake Billy Strayhorn, who grew up in Pittsburgh. The $75 VIP tickets include a preshow reception at 6 p.m. with the Strayhorn family featuring a duet with Mr. Jones and Herman "Soy Sos" Pearl. For tickets, $15-$75, www.kelly-strayhorn.org.
The Pittsburgh stop of the Metropolitan Opera National Council auditions, free and open to the public, starts at 10 a.m., going until 3 or 4 p.m., in the Kresge Theater at the Carnegie Mellon University Fine Arts building, Oakland. Local winners will proceed to the Great Lakes Region auditions in Detroit in February. Duquesne graduate and countertenor Andrey Nemzer was a top five finalist nationwide in 2012.
A Family Day will be held from 11 a.m. to 3 p.m. at the Westmoreland Museum of American Art at its temporary location, 4764 state Route 30, east of Greensburg. The free event will include entertainment by Stage Right, the Greensburg school for the performing arts and professional theater company; art activities for children and adults; a scavenger hunt; a 20 percent discount at American Marketplace in the museum shop; and cookies and punch. Information: 724-837-1500 or www.wmuseumaa.org.