how to download csv file base from the date of my data table as DD/MM/YY

function tableToCSV() { var csv_data = [];

// Get each row data
var rows = document.getElementsByTagName('tr');
for (var i = 0; i < rows.length; i++) {

    // Get each column data
    var cols = rows[i].querySelectorAll('td,th');

    // Stores each csv row data
    var csvrow = [];
    for (var j = 0; j < cols.length; j++) {

        // Get the text data of each cell of
        // a row and push it to csvrow
        csvrow.push(cols[j].innerHTML);
    }

    // Combine each column value with comma
    csv_data.push(csvrow.join(","));
}
// combine each row data with new line character
csv_data = csv_data.join('\n');

/* We will use this function later to download
the data in a csv file downloadCSVFile(csv_data);
*/

}

function downloadCSVFile(csv_data) {

// Create CSV file object and feed our
// csv_data into it
CSVFile = new Blob([csv_data], { type: "text/csv" });

// Create to temporary link to initiate
// download process
var temp_link = document.createElement('a');

// Download csv file
temp_link.download = "billingweb    .csv";
var url = window.URL.createObjectURL(CSVFile);
temp_link.href = url;

// This link should not be displayed
temp_link.style.display = "none";
document.body.appendChild(temp_link);

// Automatically click the link to trigger download
temp_link.click();
document.body.removeChild(temp_link);

}

html-cdr.ejs Download CSV