JSFiddle - React, Tailwind, and code Playground

HTML

<table id="properties">
  <tr>
    <td>Property 1</td>
    <td class="availability">9/22/2015</td>
  </tr>
  <tr>
    <td>Property 2</td>
    <td class="availability">9/23/2015</td>
  </tr>
  <tr>
    <td>Property 3</td>
    <td class="availability">12/28/2015</td>
  </tr>
  <tr>
    <td>Property 4</td>
    <td class="availability">10/2/2016</td>
  </tr>
</table>

JavaScript

var max_availability = 30;
var end_date = new Date();

end_date.setDate(end_date.getDate() + max_availability);

$("#properties td.availability").each(function() {
    var this_date = new Date($(this).text());
    
    if(this_date < end_date){
        $(this).parent().show();
    }
    else{
        $(this).parent().hide();
    }    
});