On this first Monday of 2011, we're receiving a variety of questions related to calendars. For example: What other years in the future will be like 2010, with both Christmas and New Year's Eves on Fridays? Another example: where can I get single-sheet calendar printouts for February and March 2011? You can find answers to both questions at several websites, such as: TimeandDate.com and VPCalendar.net. These sites have helpful tools such as perpetual calendars, lists of milleniums and centuries, timezones, and - in case you want to start early - countdown counters to the next new year (or to any date of your choice). The answer to the first question above is here.

If you're interested in the history of calendars, you might check library availability of Mapping Time: The Calendar and its History (also available as a library eBook) or perhaps Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year. For children, try Calendar or The Time Book: A Brief History From Lunar Calendars to Atomic Clocks.