Or every year, put it between two different months. To be decided by the winner of a contest held on that day. The winner also gets to decide what the next contest will be. In a surprise twist in the year 27 in the new calendar, when the contest day is held after the thirteenth month (Redteaber?), the winner of the contest decides the next year's contest day will be the first day of the next year – tomorrow! Mayhem breaks out and the people wish they'd listened to WithoutFurtherRelay when they had the chance.
deleted by creator
Purge day
Or every year, put it between two different months. To be decided by the winner of a contest held on that day. The winner also gets to decide what the next contest will be. In a surprise twist in the year 27 in the new calendar, when the contest day is held after the thirteenth month (Redteaber?), the winner of the contest decides the next year's contest day will be the first day of the next year – tomorrow! Mayhem breaks out and the people wish they'd listened to WithoutFurtherRelay when they had the chance.