The ides of March (Latin: Idus Martias) is the name of March 15 in the Roman calendar. The term ides was used for the 15th day of the months of March, May, July, and October. The Ides of March was a festive day dedicated to the god Mars and a military parade was usually held. In modern times, the term Ides of March is best known as the date that Julius Caesar was assassinated in 709 AUC or 44 B.C. In William Shakespeare's play Julius Caesar, Caesar is warned to "beware the Ides of March."
The term idūs (ides) originally referred to the day of the full moon. The Romans considered this an auspicious day in their calendar. The word ides comes from Latin, meaning "half division" (of a month) but is probably of non-Indo-European origin.
[link to en.wikipedia.org
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.
Beware the ides of March.
What man is that?
A soothsayer bids you beware the ides of March.
March 8 – Commonwealth Day
March 14 – Daylight Saving Time Begins
March 17 – St. Patrick’s Day
March 20 – Spring or Vernal Equinox
March 21 – Naw-Ruz
March 28 – Palm Sunday
March 30-31 – Passover