Here is another project I have been wanting to do ever since I first came across it. Well, we're in the 2nd half of the year already, but it's never too late, since MF and I still don't have a desk calendar at work, and really, I just started the calendar in July instead of January.
The instructions I used were from http://stampingmaria.blogspot.com/2011/02/easel-box-tutorial.html
The project uses up 3 x A4 cardstocks and 1 x 12" square cardstock.
Another instructions link (which I think makes a smaller version) I have saved is http://inkspiredtreasures.com/wp-content/uploads/Desktop%20Calendar%20Box%20Tutorial(1).pdf
The calendar itself is my own simple creation in an Excel file. I just may be making these for Christmas presents this year....