Why 11 × 17
A tabloid sheet is exactly two Letter sheets side by side, and the calendar uses the extra room for the day boxes. With one month per page in landscape and the usual half-inch margins, each day is about 2.3 inches wide and 1.4 to 1.6 inches tall, depending on whether the month needs five or six rows. On landscape Letter the same box is about 1.4 by 1 to 1.2 inches, so an 11 × 17 page gives each day a bit more than twice the writing space. That’s what makes it work as a family wall calendar or a shared office planner that several people write on.
What this page sets up
Tabloid paper, landscape, one month per page, starting next month for 12 months. The month title and the small previous and next months grow with the page, while the day numbers and holiday names keep their size, so the extra room goes to writing space. Holidays follow your browser’s country, as on the main calendar maker; tick the ones you want under Holidays. A notes column fits comfortably at this size, and the week numbers column takes only a sliver of the width.
Printing it
Your printer needs to take 11 × 17 paper: check its specifications for tabloid or ledger. Printers that do are often sold as wide-format models, and some go up to 13 × 19 inches. In the print dialog pick the 11 × 17 paper size and choose Actual size (or 100%); fit-to-page settings can shrink the calendar onto a smaller default sheet. The PDF’s pages are already landscape, and most print dialogs rotate them to fit the paper on their own.
If your printer only takes Letter, a print or copy shop can print the PDF on 11 × 17 paper. Ask for actual size and, for a wall calendar, card stock.
Other calendars
Smaller calendars you can type into are on the fillable calendar page, a school year for a classroom wall is on the school year calendar, and every other size and layout starts from the calendar maker.