Most "free" calendars come in a full page format but you can find others. In full_page calendars there are both portrait and landscape; large numbers with no space or small numbers with lots of space. You can also get half_page and quarter page. Then there are formats to see the whole year, or a few months, at a glance. You can find 6_up horizontal or 2_up verticals showing all 12 months, or strip calendars in horizontal and vertical with all 12 months in row. And, there are other calendars which list the dates down the left, and possibly the week days, with spaces to the right for notes or appointments.
If you're not familiar with this type of puzzle, here's how they work: An array of letters, arranged in rows and columns like a grid, is printed on a piece of paper. The array is usually square or rectangular, although sometimes you may encounter other shapes, such as a Christmas Tree shape used for a Christmas themed puzzle.