Every year, Microsoft releases template updates for Word users to print current year calendars. Hyper-organised people will have been hanging out for the 2012 releases since at least last October, but they're now available for download.
There's a mixture of family and business calendars on offer, each available with your choice of starting the week on either a Sunday or a Monday and able to be customised with your own details and images. One improvement on previous years: it's now possible to download through a browser other than IE, though the template files won't be fully installed into Word in that case.
New 2012 calendars for Word 2010 [Word Blog]