Forum:The Enchiridion Numbers

Just a conjecture - The back of the Enchiridion bears the numbers 8.13.21 - This can be interpreted as a date: August 13th, 2021.

The start of the Mushroom War? The day when the giant crater was made in the side of the Earth?

Discuss. http://images4.wikia.nocookie.net/__cb20091227230730/adventuretimewithfinnandjake/images/archive/b/bc/20100401212842!Wiki.png