New Year's Day Laughathon was a yearly marathon that began airing on Cartoon Network UK since 2014. The marathon originally featured Johnny Test, Gumball, Adventure Time and Regular Show.
In 2015, Steven Universe, Clarence, and Uncle Grandpa was added to the marathon.
The marathon was replaced by Benson's New Year's Day Marathon in 2016.
- The letters C and N briefly appears on the promos.
- The 2015 promo is mostly similar to the previous 2014 promo, however, the added cartoons did not get a mention, only cameos.