Complex sentence: KWTX-DT first went on the air on Friday, May 11,2001 at 5:10 p.m. and began regular programming on Tuesday, May 15,2001 on Digital Channel 53.
Split into simpler sentences: KWTX-DT first went on the air on Friday, May 11th, 2001 at 5:10 PM. It began regular programming on Tuesday, May 15th, 2001 on Digital Channel 53.