title: Milliseconds to UNIX timestamp
body: <p>Anyone have any idea how I would go about converting a timestamp in milliseconds from <code>1970</code> (from Android's <code>System.currentTimeMillis();</code>) to a UNIX timestamp? It need only be accurate to the day.</p>
  
  <p>I figure I could divide by <code>1000</code> to get seconds, and then divide by <code>86400</code> (number of seconds in a day) to get the # of days. But I'm not sure where to go from there.</p>
  
  <p>Many thanks.</p>