One Magnificent Morning (OMM) is an American programming block that is programmed by Litton Entertainment, and debuted on October 4, 2014 as a replacement for the animation block Vortexx. It airs on Saturday mornings on the owned-and-operated stations and affiliates of The CW; the block features live-action documentary and lifestyle series aimed at preteens and teenagers between the ages of 10 and 16, the same style of programming that Litton provides for competing blocks seen on ABC and CBS. All of the programs in the five-hour block are designed to meet federally mandated educational programming guidelines.