Portal:Cartoon Network/Selected anniversaries/May
- May 1, 2004 – Megas XLR debuts on Cartoon Network (2004-2005)
- May 3, 2009 – Foster's Home for Imaginary Friends finishes airing on Cartoon Network
- May 3, 2011 – The Amazing World of Gumball debuts on Cartoon Network (2011-present)
- May 10, 2009 – Snake 'n' Bacon an animated television pilot airs on Cartoon Network's Adult Swim block
- May 30, 2005 – The Life and Times of Juniper Lee debuts on Cartoon Network (2005-2007)