The Day of Rejection is known as a day celebrated during the month of Ensi according to a calendar that was employed on a world within the Raspar system.
The Day of Rejection appeared in a weather forecast spanning one page called "Region 29: The West Fissure." Bob Carrau authored this forecast for Monsters and Aliens from George Lucas, a 1993 book compiling concept art and photos from different George Lucas endeavors. Leland Chee, an employee of Lucasfilm and keeper of the Holocron continuity database, has stated that the book's contents are non-canonical.