Midpoint day in the Roman month of March The Ides of March is the day on the Roman calendar marked as the Idus, roughly the midpoint of a month, of Martius, corresponding to 15 March on the Gregorian calendar. It was marked by several major religious observances. In 44 BC, it became notorious as the date of the assassination of Julius Caesar, which made the Ides of March a turning point in Roman history. 385,164 views on March 15, 2016 — Wikipedia's most-read article that day. Also most read: Donald Trump, Superman: Red Son, Enya, 10 Cloverfield Lane. Wiki link