The Ides of March, known as Idus Martii in Latin, refers to the 15th day of March in the Roman calendar. In ancient Rome, the Ides were considered an important marker for certain religious observances and political activities. Each of the Ides was sacred to Jupiter, the Roman’s supreme deity.

The Ides were also used as markers for certain religious observances and political activities, including the settling of debts and the payment of taxes. They were also important dates for the performance of public ceremonies, such as the opening of the gladiatorial games. But the Ides of March gained notoriety due to one fateful event - the assassination of Julius Caesar on March 15, 44 BC.