Nicktoons Forever is a digital cable Nickelodeon-related animation channel that is similar to Nicktoons, except it airs shows from the golden age of it. It was first initiated on Saturday, February 9th, 2013 at 10:00am ET with the first episodes of Invader Zim and Rocket Power.
Everynight around 11pm or after Midnight (eastern time), the channel would stop airing regular programs and air shorts made by Nickelodeon or shorts from foreign animation markets. So these are airing times for when regular programming is being aired on the channel.
Mondays - 6:00am - Midnight ET
Tuesdays/Saturdays - 5:30am - 11:45pm ET
Wednesdays & Thursdays - 6:15am - 12:15am ET
Fridays - 4:00am - 1:30am ET
Sundays - 5:15am - 1:45am ET