My Calendar is on Kickstarter, go get it!
The calendar is a 24" x 36" calendar and it's really the best wall calendar ever made. Yes, I'm biased, but several people who have used the 2013 calendar have said that as well. Geekdad even called it "simply perfect."
Big Picture Calendar 2014
So go and check it out. If you want to DIY it there's also a PDF you can print across 10 pages.