How will i filter sitemap urls by last modification date of today in google app script?

with the code below am able to retrieve a site’s sitemap urls and last modification dates. the problem is that there are over 600 urls retrieved, how will i filter in the script to only show urls with the last modification date of today, removing urls with old dates?

var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheetByName(‘Sheet1’);

//Create function that fires when menu item clicked.

function getLinks() {

var xml = UrlFetchApp.fetch(‘https://example.com/blog_listing-sitemap.xml’).getContentText();

var xml = XmlService.parse(xml);

var root = xml.getRootElement();

var ns = XmlService.getNamespace(‘http://www.sitemaps.org/schemas/sitemap/0.9’);

    //Get list of sitemap urls

    var sitemaps = root.getChildren();//sitemap

    //for each sitemap URL

    for (i = 0; i < sitemaps.length; i++) {

      //Get child elements of sitemap element

      var sitemap = sitemaps[i].getChildren();

      //For each child element of sitemap element

      for (a = 0; a < sitemap.length; a++) {

        var element = sitemap[a];

        //Find loc element for sitemap URL

        if (element.getName() === 'loc') {


         // xml = loadXML(element.getText());

          appendRows(xml.getRootElement().getChildren());

        }
      
   else if (root.getName() === 'urlset') {//if sitemap is url sitemap.

    appendRows(root.getChildren());

                   }

                 }

               }

           }

function appendRows(items) {

var urls = [];

var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); //to write rows

//var filtered = data.filter(function (row) {

// return row[1].getFullYear() === 2016;

// });

for (var i = 0; i < items.length; i++) {

var children = items[i].getChildren();

var row = [];

for (var a = 0; a < children.length; a++) {

  var child = children[a];

  if (child.getChildren().length === 0) {

    row.push(child.getText());

   // row.filter(items)

  }

}

urls.push(row);

}

//write rows to sheet

sheet.getRange(sheet.getLastRow() + 1, 1, urls.length, urls[0].length).setValues(urls);

}