Of all the designs I’ve cobbled together, the A4 unit seems to have a longer life than most. The latest incarnation is a calendar, put together by Sok Song and his Creased team. They really are a professional group and the magazine is highly recommended. You can subscribe to either hard or electronic copies.
Several years ago, someone in Hong Kong put together a commercial version of this, but it was a one-off, so I guess didn’t sell well. I still think there are commercial possibilities for this, must look into it again.
View and print the 2012 calendar here.