Another trick (for Android only)
Add a web viewer
to your screen and in the URL add this
data:text/html,<meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<h4>Unix To Standard Date</h4>
<div id="DisplayDate"></div>
<script>
document.getElementById('DisplayDate').innerHTML = new Date(162984485300).toString();
</script>
You should see the human readable date of the Unix date number given.
Of course you can put this string in a variable and change the unix number as required.