An image of fireworks has more to do with Whistler than 5th November. It was only recently that fireworks were associated with that date. He painted many images of fireworks let off at one of the riverside pleasure gardens, one of which was criticised by Ruskin. You may say this is throwing a pot of metal thread scraps in the public's face!
The message is from the "Merchant of Venice" as set by Vaughan Williams in "Serenade to Music".