Had it not been for Julius Caesar's death and a Shakespeare play, an ide would probably be most associated with its basic meaning, a full moon.
But alas, that isn't so.
On the date of the Roman calendar in 44 B.C. that corresponds with our March 15, the power-hungry Roman emperor was assassinated. Before that incident ancient Romans thought of an ide as simply one of several common calendar terms that marked monthly lunar events.
"You can read in Cicero's letters from the months after the Ides of March. … He even says, 'The Ides changed everything,'" Josiah Osgood, an assistant professor of classics at Georgetown University in Washington, D.C., told the magazine in a 2004 article.