At work I have the B. Kliban cat calendar. At home, we rely pretty much on the calendar on the PC to keep track of stuff, so the calendars are purely decorative. I have one in the office that is from the Lang Co. of Delafield, WI, of waterfowl. They do kind of folksy, early American type calendars, and they sell nice frames to put them in. I used to always have the Lang cow calendar in the kitchen, but when we moved to this house, I didn't have room to display much of my cow stuff since my husband wanted to keep his mom's decor. (I snuck a few moos in here and there though).
You know, this reminds me - since my husband forgot to give me the usual calendar for Christmas, I'll have to go out and get a new one for the office!