These desktop style 'Calendars' are actually no good at all for recording schedules or plans since there is nowhere to write these things down. They're more like daily activity countdowns because the idea is to fold one item per day which is perfect for people like me who enjoy sitting down at their desk or computer each morning and having a little project to complete. I have the 'Fold a Day' version by Jeff Cole which is fantastic and a great way to get older kids and adults into the art of origami. You can see some of my personal photos from this below.
This is the one I'll be getting for next year. I had the 2013 and 2014 version which I have really enjoyed (photos shown below) so I will be getting the 2015 one too. You often need to get the Origami box sets early because they do tend to sell out. You get instructions on one side of the paper and patterned and colored origami sheets of the standard 6x6" size on the other. Because I like to keep all the instructions so I can easily see how to make favorites again and again - I simply use my own origami paper to fold each item. But everything you actually need is in the box. It is good for older kids and adults who are new to paper folding. These are quite easy projects but I enjoy them even though I can make more advanced items.
Another popular origami set is the page a day version and I believe that this works in entirely the same way as the brand that I get above. The idea is a bit hit with people who just like to make items from paper.
Aimed more at the male market is this paper airplane that can be assembled and then flown around the room. This is a great one for bored office workers!