Attack Of The Dice

EQ2 is one of few games that has an in-game excuse for April Foolery - Bristlebane, the god of mischief and thievery comes out to play for a world event that includes killing 10 rats (multiple times), chests shaped like the Companion Cube from Portal scattered throughout the world, and the opportunity to win various Dungeons and Dragons Dice in honor of the late Gary Gygax. 

The holiday was actually one of my first serious experiences with the game back in 2009, and it's gone through only relatively minor tweaks.  Every year seems to add another quest or two - this time out, it was two additional types of dice and a literally rainbow colored horse.  It's random, light entertainment, but it's fun.  Sometimes that kind of laid back activity is a good change of pace for an achiever-oriented genre.