Is it finally ripening ?
Hubby has to buy one every year to scoop out and light his candle inside.
We always buy a tub of sweets for the children who knock - the pumpkin is our way of telling them they can knock on our door.
Mind you I put one of the posters on daughters door which I have shared a link to.
I printed it and laminated it for her last year, as it's nopt safe for her to be answering her door in the dark - so I think the posters are a good idea.