retrieve multiple html values in javascript

On my node.js backend, I have this:

  {
    DATE: '2021-12-11 02:17:59.317432',
    LOCATION: 'Location',
    ASSIGNED_TRAINER: '[email protected]',
    CLIENT_USERNAME: 'Test User Name'
  },
  {
    DATE: '2022-01-04 02:27:11.278146',
    LOCATION: 'Location',
    ASSIGNED_TRAINER: '[email protected]',
    CLIENT_USERNAME: 'Test User Name'
  },
  {
    DATE: '2021-12-15 10:30:00.000000',
    LOCATION: 'Location',
    ASSIGNED_TRAINER: '[email protected]',
    CLIENT_USERNAME: 'Test User Name'
  }

and on the front-end, I am trying to grab the DATE field. and so what I do is this:

 <% if (data.length) {
    for(var i = 0; i < data.length; i++) { %>
      <input type="text" name="passedDates" id="passedDates" value="<%= data[i].DATE %>">
      <%  }
    } else { %>
   <% } %>

and then in my <script> tag, what I do is:

  for ( var z = 1; z <= lastDayOfM; z++ ) {
    
    const yourDate = new Date()
    var theDate = yourDate.toISOString().split('T')[0]

*here I am trying to get the values that I pass through the id ‘passedDates’

    var passedDates = document.getElementById("passedDates").value

    var finalDate = passedDates.split('-');

    var yyyy = finalDate[0];
    var mm = finalDate[1];
    var dd = finalDate[2];
    var theFinalDay = dd.split(' ')

but then I log yyyy, mm, dd, and then theFinalDay[0]. But it doesn’t store ALL of the date values in there. I need all of them in there, because then when going below:

    // check if todays date
    if ( z == today.getDate() && y == today.getFullYear() && m == today.getMonth() ) {
      var myTestPassedDate = theFinalDay[0]
      if (myTestPassedDate) {

*here i try to insert something into HTML, but it won’t do all 3 because it only stores one.

 day.innerHTML = myTestPassedDate + "<br><img src='https://miro.medium.com/max/512/1*nZ9VwHTLxAfNCuCjYAkajg.png' style='height: 10px; width: 10px;'>"
 

 }
      day.classList.add("today");
    }

    

how do I fix what I am trying to do? sorry if it is confusing, feel free to ask questions.