Disciple Sunday will be observed on Sunday at the 10:40 a.m. worship service at Signal Mountain Presbyterian Church, 612 James Blvd., Signal Mountain. Communion will be observed at both the 8:15 and 10:40 a.m. services. The Rev. Andy Cornett will preach. A college Sunday School class will begin Sunday, taught by Joe and Jennifer McCall, meeting in the Underground beneath the Youth Cafe.