Comedytime Saturday is the official branding for a one-hour programming block which has aired off and on since 2011-12 television season on CBS between 8 and 9 p.m. ET/PT on Saturday nights. The branding is only listed by industry sources as a placeholder for the time slot, rather than an official on-air branding. The placeholder timeslot was also the lead-in to CBS' Crimetime Saturday lineup, which was reduced by an hour to accommodate the change. Originally conceived as a vehicle for at least one first-run sitcom (thus reviving the practice of programming entertainment programs on Saturday nights for the first time in several years), the block instead became an hour for airing two in-season or previous season reruns of CBS sitcoms from the network's Monday and Thursday night lineups.