17 April 2024
09 April 2025
15 April 2026
14 April 2027
COSS, Concordia’s annual URSCA Symposium, is held on one Wednesday each April. Classes, rehearsals, and practices do not meet during COSS so that everyone may participate and attend. Typically, COSS events take place between 8:00 a.m. and 5:00 p.m.