Greetings all.

I need is a script that will move a file from one known dir to another, then grab another file from a different dir to replace it, and have absolutely zero clue how to do this.
Here's what I am trying to do:
A web client wants his site header image to change based on US holidays.
So, a script would grab the default header jpg, move it to a different dir somewhere on the site, then grab a header that has, say, a Christmas theme, and move that into the dir where the default one was. Make sense?

I could then make a cron job that exe's the script based on known holiday dates.