The esc_attr( date( 'Y' ) ) picks up the year. The "." dots concatenate in php.
I really recommend downloading Sublime Text for editing CSS/HTML/PHP (and any other language's) files. It immediately tells you if something is wrong in your code.
For example, for php, all your commented function would have been shown in a boring background colour, which would have alerted you to the fact that it was a comment. Similarly, if you miss off a closing ";" in CSS, the next declaration will be shown differently. In HTML, if you put your cursor on an opening div, it underlines the closing div. Etc. It's a really great editor.
And once you discover you can have multiple cursor/insertion points, there's no looking back :-)