On September 1, 1997, a weekday morning block was added from 7:00 a.m. to 8:00 a.m. and the weekday afternoon block was extended by one hour, running from 3:00 p.m. to 5:00 p.m. However, WGN's superstation feed, as well as some WB affiliates, had to wait until the next day, as they preempted the blocks to carry "The Jerry Lewis MDA Labor Day Telethon". Some WB affiliates (such as WPIX in New York City, KTLA in Los Angeles and KWGN-TV in Denver, Colorado) aired the weekday morning block in conjunction with the weekday afternoon block, extending it to three hours, running from 2:00 p.m. to 5:00 p.m. On the same date, the block received an on-air rebranding – which included a revised logo and graphics package centered upon the Warner Bros. Studios lot theme that was also used in promotions for The WB's primetime programming during the network's first eight years on the air – which was developed by Riverstreet Productions, and lasted until 2005.