Bacchanal is Columbia's annual spring festival, and is planned by Bacchanal Events, a student group under ABC. Bacchanal is known for its week-long series of events, which change drastically each year depending on the theme. Each Bacchanal theme is a portmanteau of Bacchanal and some other word. Past themes include 'Bacchanaliens' and 'Woodstocchanal'.
Undoubtedly the biggest event for Bacchanal is the annual Concert on the Steps.