The calendar in question is a standard-size printable calendar, which you should be able to find in any workplace supply store. You will want to download the calendar onto your computer system first, then move it to your hard drive.
When you have conserved the calendar onto your computer, it will require to be converted into a PDF format. Just search for the proper file type, then follow the on-screen instructions to conserve it as a PDF. It is extremely most likely that October 2021 will be providing numerous various templates.
Image source: wincalendar.com