It does not appear in the photos and in the description that is printed a calendar from 2009 and 2010 in the book at the beginning, which is ersteckt on the first few pages. So you can not do anything more in 2011. I just printed out a current calendar of self-adhesive paper, cut the edge (the outer corners of the paper in the book are around) and glued. Is hardly noticeable.
Because of the hard cover and the rubber band gets the paper dog-eared with frequent take away in your pocket. That's great.
Because of the mediocre quality of the paper and the old calendar only 3 stars in the overall assessment.