The M8 Event or the 8 Million Visits Event, was an event created by PlaceRebuilder to celebrate Reason 2 Die reaching a visit count of 8,000,000. The update was a bit late so the game had reached approx 8.4 million visits before the event aired.
King Cake was added later, at 8,700,000 visits. The M8 Event was first thought to test the event slot that got added in Version 29, but later on developed into a full-scale event.
M8 Event was the first official event in R2D.
M8 Event was originally made to try out the new Event item slot.
While King Cake was made exclusively for this event, it has appeared during other events.