A Simpsons Christmas Special 2018 Event

 is the 1st multi-event of 2018, the 1st multi-event overall, the 36th major event overall and the 7th Christmas Event. It was released on December 5, 2018, and ended on January 2, 2019.

Unlike the major events from before, it was divided into four acts:
 * Act 1: December 5, 2018 - January 2, 2019
 * Act 2: December 12, 2018 - January 2, 2019
 * Act 3: December 19, 2018 - January 2, 2019
 * Act 4: December 26, 2018 - January 2, 2019

Trivia

 * Santa's Little Helper was offered for free to players that didn't have him and given a visual task on December 17, 2018, to celebrate 30 years since "Simpsons Roasting on an Open Fire" premiered on TV.