DonnaYoung.org has several spreadsheets that one can use to generate calendars, however; the spreadsheets on this page are for subscribers.
XLS & XLSX Files
Change the Date: Change the date at the top of the calendar.
Personalize the Calendar before Printing: If you are familiar with Excel then you are welcome to change colors, fonts, and add images. The cells under the dates can be typed in. If you make a lot of changes, be sure to select the print preview to make certain that the month still fits on one sheet of paper before printing.
Broken Spreadsheet: If you break the file and if you are an active subscriber, don't email me, come back to this page and download another one.