The calendar in question is a standard-size printable calendar, which you should be able to find in any office supply store. You will want to download the calendar onto your computer system initially, then move it to your tough drive.
As soon as you have conserved the calendar onto your computer system, it will require to be transformed into a PDF format. Merely search for the correct file type, then follow the on-screen instructions to conserve it as a PDF. It is extremely likely that October 2021 will be providing lots of various templates.
Image source: 2021calendarsprintable.com