Complex sentence: Originally an afternoon and evening block on Cartoon Network and ended on September 20,2008, it is currently (as of May 18,2016) a late Saturday night adult-orientated animation block on Adult Swim.
Split into simpler sentences: Originally an afternoon and evening block on Cartoon Network and ended on September 20,2008. It is currently (as of May 18,2016), a late night adult-orientated animation block on Adult Swim.