question about the background for the PSP

I was just curious, because Im just a little worried that my background will get ghostings if I leave it on there long but,
can I prevent that from happening if I set the images to their individual months?

NO, not at all man. I have had my PSP background set on my image for about 2 months now, nothing has gone wrong, and nothing will.
I can assure you your not getting ghostings

what are ghostings?