In 2007 Sara Rosso, an American blogger and tech extraordinaire living in Italy decided to use her influence for good when she suggested the need for a holiday to celebrate Nutella. I think all days that end in Y are a great day to celebrate Nutella, but a few more people jumped on board including the blog Bleeding Espresso, and it's been spreading every year since.
1+ jar of Nutella
Step 1: Use spoon to transfer Nutella to mouth.
If you don't have a spoon, you can substitute your hand.