Hello !
More than 12months? Oh noo years woulld be so long... What about Santa claus?? uhh?
To print your calendar... mmm I suggest you to bring the files to a printer shop, unless you have a laser printer and some fat paper (maybe at work?).
I usually make it print in a shop and it cost me something like 20 euros... (it's a bit expencive but it's far better than if i would have printed it with my inkjet printer and thin paper).
If you make it print in a shop you should choose one of the pdf versions, they're both ready to be printed and then the shop won't charge you more.
If you choose the 1st version (big one A3) I advise you to make it bing!
If you chose the 2nd version (A4 it's to be printed on both side) you 'll just have to bend it and to staple together in the middle and then make a little hole to pin it in the wall.
Hope I helped
And thanks again to everybody you're so sweet !!