Does anyone know what dates your copyright has to cover? Is it from the date you started your site to the presesnt? Or is it the date that the content created to the present? For example on my home page of my site I have this:

© 2000-2006. All Rights Reserved.

Depends on what you're claiming.  If it's the images, it's best to make a note near the bottom that says something like, "All images (or content) copyrighted by (your name here)."  If it's the format of the website, I don't know the answer.

If an individual image is being marked, then certainly include the year the image was made.

Images are (or may be, if needed) copyrighted whether or not there's a specific annotation of copyright.  The annotation simply means that you are aware of what copyright means and that the viewer should know you're aware.

-Don

My attorney told me that (1) a copyright notice is not necessary, because you automatically own copyright to any images you create (except for work-for-hire), but it is a good idea, because it makes it harder for potential thieves to claim they didn't know about your copyright. (2) if you are going to include a copyright, the proper form is "©", "your name", "year(s)". Those are the only 3 necessary elements. Adding such things as "all rights reserved" is redundant and unnecessary. If you don't have it exactly right, it isn't all that critical, because it is really a matter of convention, and not a legal requirement.

You shouldn't get legal advice from anyone other than your attorney.