Sunday Service

During the school year, the public library where I work is open on Sunday afternoons. Signs posted around the library read, Sunday service available 1:30-5:00, September-June. One day a woman was returning some books when she noticed one of these signs. "Oh, you have Sunday service now?" she asked me. "Yes, from 1:30 to 5:00, September through June," I explained. "I see," she said. "And what denomination is it?"