Beware the Ides of March

I knew this phrase, but didn't know what an "ide" was, so I turned to Google. Thanks Google!

As far as Caesar knew, the Ides were just another day.

Day 360

The soothsayer's warning to Julius Caesar, "Beware the Ides of March," has forever given the date a sense of foreboding. In Roman times the expression "Ides of March" was simply the standard way of saying "March 15." Even in Shakespeare's time, sixteen centuries later, audiences attending his play Julius Caesar wouldn't have blinked twice  about hearing the date called the Ides. It was just one of several common calendar terms used to mark monthly lunar events. The ides simply marked the appearance of the full moon. But the Ides of March became a day of infamy after the events of 44 B.C. when Julius Caesar was assassinated. The phrase came to represent a specific day of abrupt change that set off a ripple of repercussions throughout Roman society and beyond.