Beware the Ides of March

Caesar:
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.

Soothsayer:
Beware the ides of March.

Caesar:
What man is that?

Brutus:
A soothsayer bids you beware the ides of March.

Julius Caesar Act 1, scene 2, 15-19

Beware the ides of March. Keep your wits about you. I know I will on this gloomy, rainy, icky day. So sad that I have to go to a funeral today too.