What does an amateur historian and instructional web design teacher with more than 100 books written by and about the American Presidency do with extra time off on Presidents’ Day Weekend? He starts building an online annotated Calendar of Presidential History, of course. Completely nerdy, I concede. And months from completion, I admit. But to have spent the last three days lost in the 18th Century has been surreal. A welcome retreat from thinking or writing about current events.