150 years ago today in PHP : <p>I am looking to have a one line return function to get the date 150 years ago from today.</p>

<p>I currently have,</p>

<pre><code>return date('Y-m-d', strtotime('-150 year'));
</code></pre>

<p>The problem is this returns 1970-01-01 instead of 150 years ago.</p>

<p>Why is this?</p>
