Do I still have time for this advent calendar?

I had a plan for an advent calendar, it involved paper bags, string, number stamps.  It was going to happen.  But then I saw this genius giant advent calendar from Oh Happy Day.  Genius and gorgeous all in one.  Do I have time to get to Ikea to buy the fabric and do one myself?  It would look amazing at the front door, and how genius if you don't have space for a tree.

Oooooh I want to make one right now!!!  Fabulous instructions and more pretty pictures at the post here, and they have even made suggestions for cute things to put in the pockets here.