On March 23 from 9 am – 8 pm the Worcester Chapter of the American Guild of Organists will sponsor an all Bach music day “Bach-A-Thon” with different performers every 30 minutes including organ, strings, piano, voice, guitar and flute. Proceeds will beneift St. John’s Food for the poor program and Abby’s House. Day passes are $25. ($20 for seniors and $10 for students with an ID. Begins at 9 am at Trinity Lutheran Church, 73 Lancaster, St., Worcester and runs until 8 pm. Visit www.worcesterAGO.org for the full schedule and to purchase advance tickets.