What is the Ides of March and Why Should I Beware It?

Caesar: Who is it in the press that calls on me?
I hear a tongue shriller than all the music
Cry "Caesar!" Speak, Caesar is turn'd to hear.
Soothsayer: Beware the ides of March.
Caesar: What man is that?
Brutus: A soothsayer bids you beware the ides of March.
~Julius Caesar by Shakespeare

In Roman times the Ides of March was simply March 15. "Ides" comes from the earliest Roman calendar which was somewhat complex. It utilized 3 days of each month as reference points:

• Kalends (1st day of the month)
• Nones (the 7th day in March, May, July, and October; the 5th in the other months)
• Ides (the 15th day in March, May, July, and October; the 13th in the other months)

The remaining days of each month were identified by counting backwards from the Kalends, Nones, or the Ides. For example, March 3 would be V Nones—5 days before the Nones. This convoluted method of time keeping was used in the Julian calendar as well and into the Middle Ages and Renaissance.



Note: "What are the eyes of march" appears as a related search if you type "the ides of march julius caesar" in to Google search.

Something else I learned: The festival of Lupercalia was held in Ancient Rome on February 15. The festival celebrated the founding of the city of Rome.