On October 2, 2007, The CW announced that it would discontinue the Kids' WB programming block through a joint decision between corporate parents Time Warner and CBS Corporation, due to the effects of children's advertising limits and cable competition; the network also announced that it would sell the five-hour Saturday programming slot to 4Kids Entertainment. The Kids' WB block aired for the final time on May 17, 2008 (for some stations that aired the block on a day-behind basis, the block's last airdate was on May 18, 2008).