What do the Twins 2011 calendar and the Twins lineup card have in common?

The Twins release a calendar every year and give it away, and then my parents wrap it and give it to me as a present. Again, my parents wrap a free giveaway and give it to me as a gift.
Anyways, I finally reached December, and there seems to be something awry. Just like the Twins daily lineup card so many times this season, the calendar appears to be missing a "7".