How often does the ides occur in the year?

The Ides occur multiple times throughout the year, specifically on the 15th day of March, May, July, and October, and on the 13th day of the other months in the Roman calendar. The most famous Ides is the Ides of March, which is notably associated with the assassination of Julius Caesar in 44 BCE. The term "Ides" refers to the middle of the month, and its significance varied depending on the month.