The Trio Con Brio Copenhagen, which was welcomed with great acclaim when it last performed in Sonoma, six years ago, returns for an afternoon concert on Saturday, March 16. The ensemble will perform music by Haydn and Mendelssohn, plus Irish Folk tunes, and a piece especially written for it by the contemporary Danish composer Per Norgard. The event is sponsored by the Sonoma Classical Music Society. 3 p.m. $10-$25 at the door. Trinity Episcopal Church, 275 E. Spain St. Sonomaclassical.org.