I have an obsession of Advent Calendars! Its true. SO true! This is a new one for this year. Hardly worth a tutorial. I just picked up a square plate from wally's and added my vinyl. It is compatible with a dry erase marker so I will just simply wipe away and write in the new number each morning. Fun! (also great for those concerned about eating too many treats this time of year.) If you'd like a decal let me know and I can hook you up. They will be in my etsy shop tonight or tomorrow morning.