With the Premium Calendar App, when you print a calendar from the MONTH view, it does not include the month name or year, like this:
There is a post from 2019 showing a workaround, but it requires you to include the legend at the top. https://community.smartsheet.com/discussion/63206/calendar-app-pdf-does-not-print-month With that method, the month/year label is not large enough, and is not centered. Also, with many items in your calendar, the legend is just clunky, but there are no controls to hide or manage the legend