Question: Since 2012 Park Jung-chul has been a cast member of a reality show that first aired on which day ?
Sentence (from "Law of the Jungle (TV series)"): Originally airing at the Friday 11:05 pm KST time slot, the program was switched into "Good Sunday" beginning May 6, 2012, airing before "Running Man" at the 5:00 pm time slot, replacing "K-pop Star Season 1".
Relevant evidence: No