JSFiddle - React, Tailwind, and code Playground

HTML

<table border=1>
    <tr><td data="1342263045"></td></tr>
    <tr><td data="1342251916"></td></tr>
    <tr><td data="1342251846"></td></tr>
    <tr><td data="1342202558"></td></tr>
    <tr><td data="1342202557"></td></tr>
    <tr><td data="1342202048"></td></tr>
    <tr><td data="1342202047"></td></tr>
</table>

JavaScript

function formatDate(date){
  if(typeof date=='number'){
    date=new Date(date);
  }
  var monthNames = [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ];
  return      monthNames[date.getMonth()]
         +' ' +date.getDate()
         +', '+date.getFullYear()
         +', '+((date.getHours()<10)?'0':'')+date.getHours()
         +':' +date.getMinutes();
}

$.each($('table tr td'),function(i,entry){
    $(entry).text ( 
        (1000*$(entry).attr('data'))
       +' => '
       +formatDate(1000*$(entry).attr('data')) 
    );
})