He didn't just throw dice or march in, see what's what and grab the locals by the nadgers.

JC was quite a chap and of course why its called the Julian Calendar. Many other calendars are available. Kalends is the source of the name for calendar and the Roman day of month counting is pretty involved - http://www.polysyllabic.com/?q=calhistory/earlier/roman/kale... Kalends, nones and ides.

JS died on the ides of March ...