One of my favorite projects is the tea towel calendar. It's like a poster you can use. Here's a selection of calendars I've done over the years. While many are nostalgic in nature, I try not to follow trends so they can be updated each year and never go out of style.

The 2012 calendar, loosely based on the circular Mayan calendar, which at the time was rumored to show the end of the world occurring in December 2012, received 1st Place out of 146 entries in the Spoonflower
Design-of-the-Week contest themed '2012 Tea Towel Calendar Designs'. (November 2011).