Back in 2015, when I was a Stampin' Up Demonstrator, Stampin' Up sold a perpetual calendar stamp set. I created perpetual calendar sheets with stamping and cutting instructions, as well as instructions on constructing a box to contain the calendar sheets as well as any cards you wanted to add to the box. See that blog post here I still use that box to this day. I updated the box a little bit by adding different papers, but I am still using it and it has held up well.
I am still getting requests for the PDF for the perpetual calendar. Since Stampin' Up doesn't sell the stamp set any longer and you may not want to purchase a separate stamp set, I decided to update the calendar sheets to include the months already printed on the sheets. I also updated the cutting instructions somewhat to allow for the new format.
If you are interested in purchasing this new PDF, I have added it to my Etsy shop. This is easier than having you contact me on Facebook and having to wait for a reply and to receive the PDF. This way you can download it instantly for a nominal charge. It is not a money making project, just a convenience for both of us. Here is the link to the Perpetual Calendar in my Etsy Shop.
This has really proven to be a handy tool in my craft room for remembering birthdays! I think you will find it useful as well!