I had a teacher friend message me last night asking this:
I have always been making my calendars for school in Publisher because I like to make them pretty and fun. I recently saw that Publisher is not always available in the office suites anymore. Do you know of any software (preferably free to cheap) that could be used to make something similar to this?
Of course, my immediate answer was Google Slides! You can edit the size of your slides so they are the same dimensions as a regular piece of paper, and then design away!
I made a video tutorial of how to accomplish this on your own, or you can use my copy of the slide (click to make your own copy) and edit as you please!