2008 Calendars, Part I

A dodecahedron (which can be turned into a stellated dodecahedron as the year progresses):

http://fortran.orpheusweb.co.uk/Models/Cal08.pdf

Christmas Cards

Three suggestions, with a 3D folding version last.

http://christmas.howstuffworks.com/how-to-make-christmas-cards-and-stationery2.htm