The Ides of March—a day of murder that forever changed history The assassination of Julius Caesar in 44 B.C still resonates as a day of infamy. Here's how the plot unfolded.Julius Caesar's bloody assassination on March 15, 44 B.C., forever marked March 15, or the Ides of March, as a day of infamy. It has fascinated scholars and writers ever since. For ancient Romans living before that event, however, an ides was merely one of several common calendar terms used to mark monthly lunar events. The ides simply marked the appearance of the full moon. But Romans would soon learn...