1) Ad time 2) After dark, short form 3) After dark, these days 4) Brief period of darkness 5) Casual evening 6) Commercial time 7) Commercial time of day 8) Dark time for advertisers 9) Dark time in ads 10) Dark time in many ads 11) Dark time in promos 12) Dark time in the ad biz 13) Dark time on Madison Avenue Found on https://www.crosswordclues.com/clue/nite