Many sites offer a single month at a time. That works okay since people only print one month at a time. Downloads are usually in Word, Adobe, or Excel. Which you use depends on which software you are comfortable with. If you know Excel best then get an Excel calendar. If you are very good with Word, there are formats available which can be adjusted on the screen. It takes some practice to add notes to any template, but it's not too bad with practice.
Look for ways to take some of the scare out of Halloween for young, impressionable guests. Printed material of any fun and fall nature will help since the lights need to be bright for these pages to be read. Older guests and teenagers often forget just how terrifying the world can be to the younger ones. Highlight the fun images of pumpkins and scarecrows while minimizing the scarier motifs when young children are present.