The Ides of March is the 74th day in the Roman calendar, corresponding to 15 March. It was marked by several religious observances and was notable for the Romans as a deadline for settling debts.
The Ides of March is best known as the date on which Julius Caesar was assassinated in 44 BC. Caesar was stabbed to death at a meeting of the Senate. As many as 60 conspirators, led by Brutus and Cassius, were involved. According to Plutarch, a seer had warned that harm would come to Caesar no later than the Ides of March. On his way to the Theater of Pompey, where he would be assassinated, Caesar passed the seer and joked, "The Ides of March are come", implying that the prophecy had not been fulfilled, to which the seer replied "Aye, Caesar; but not gone."
It's significance to ONI is that of the frumentarii; the alias ONI uses and what would be one of the oldest accounts of networked informants and spies. The Ides of March has always been a time of stagnation, with no holidays in the month of most countries and game populations dying down from Winter/Christmas gifted games. Every Ides of March there is interest in re-enacting the play from The Tragedy of Julius Caesarplay by William Shakespeare.