Comment on Stallion Responsive SEO Theme Layout Options by SEO Dave.
That being said if you don’t mind changing code, I suppose you could add any date by replacing this code with any date:
The file footer.php
<?php the_time('Y'); ?>
Also see http://codex.wordpress.org/Function_Reference/the_time for possible code options. See the Related links at the bottom like the_date which might use the latest posts date (not sure).