Yoga calendars can be used for decoration and for inspiration for your own yoga practice, as well as for keeping track of your important dates and meetings.
I buy a couple of Yoga Journal calendars each year -- one for home, and one for my yoga studio. My students enjoy seeing the new "Yoga Pose of the Month" each time a new month comes around, and we've had some interesting discussions on how to go about practicing some of the more difficult poses.
The yoga calendars featured here are visually appealing, either with beautiful yoga poses, or nature photographs. They may very well inspire you in your own yoga practice, or if given as gifts, inspire others.