The term "Ides" refers to a specific day in the Roman calendar, typically falling in the middle of the month. For most months, the Ides is the 13th day, but in March, May, July, and October, it is the 15th. The Ides were significant in ancient Rome for various religious and cultural observances. One of the most famous events associated with the Ides is the assassination of Julius Caesar on the Ides of March, which is March 15, 44 BCE. This event marked a turning point in Roman history, leading to the end of the Roman Republic and the rise of the Roman Empire.