People on this list may be interested in this talk from PyCon 2013, available on YouTube at http://www.youtube.com/watch?v=GBKqRhn0ekM In it Lennart Regebro provides an overview of historical calendars before moving onto the modern real world issues developers face when dealing with calendaring. -- Stuart Bishop <stuart@stuartbishop.net> http://www.stuartbishop.net/