just a simple one liner that will show the current year, so no more need for static years in html footers!

var d = new Date();
document.getElementById("year").innerHTML = d.getFullYear();

Usage Example

Example Code

<div>
Copyright © <span id='year'></span>
</div>

<script type="text/javascript">
var d = new Date();
document.getElementById("year").innerHTML = d.getFullYear();
</script>

A Shorter Way

The above way works ok, but probably is a bit long. Here is a quick one liner.

<span id='year2'></span><script>document.getElementById('year2').innerHTML = (new Date().getFullYear())</script>