The first couple day planners I purchased on the cheap, but then I realized it's pretty stupid simple and I could totally just make my own for even CHEAPER. So I did.
I found a 99 cent children's book on birds at the used book store and tore out the interior pages and decorated it all DIY gay, as you can see above. I even used felt and Velcro for a fastener, and Martha Stewart brand wedding invitation embelishments spray-painted black. WTF, right? I was in a frenzy, so I even busted out the pinking shears, duct tape, and Dymo label gun.
For the interior calendar pages I just used Word and created tables with the right amount of cells and filled in the date info. I printed and stapled it half-size zine style, which fit inside the book perfectly, and glued the end pages to the inside book covers.
It's a little ugly.