milliseconds to UNIX timestamp
<p>Anyone have any idea how I would go about converting a timestamp in milliseconds from 1970 (from android's System.currentTimeMillis();) to a UNIX timestamp? It need only be accurate to the day.</p>

<p>I figure I could divide by 1000 to get seconds, and then divide by 86 400 (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>
