title: How to get timestamp of current month, first day of month, zero hour
body: <p>I am trying to get the timestamp of the first day of the month at 00:00:00.</p>
  
  <p>For example, the timestamp of Jan 01 2012 00:00:00</p>
  
  <p>I'm doing this:</p>
  
  <pre><code>$test_month = time(); // Seconds
  $test_month = date('M', $test_month); // This month
  $test_month = strtotime($test_month); // Timestamp of this month
  echo $test_month;
  </code></pre>
  
  <p>This is returning zero hour of the current day of the month, not the start of the month. </p>
  
  <p>Any suggestions?</p>