Marymkearney, you could write a similar program for your grid calendar.
1. Print HTML start boilerplate. Start an HTML table and row (tr). 2. Read a line of calendar.txt. 3. Print contents of the day as table cell (td). 4. If day is Sunday (string matches "\bSun\b"), print row change (/tr, tr). 5. ... 6. Profit.
HTML is quite convenient for printing, and you can modify it with CSS. As an added bonus for Quinzel, you can copy your static calendar to your devices, and make any device show it - so you don't need to turn those pages. To make the static HTML file available to your devices, you could use syncthing or a web server in local network.