<div>
  <p class="g1-meta entry-meta entry-byline entry-byline-with-avatar">
    <span class="entry-author">
      <span class="entry-meta-label">von</span>
      <a href="#" title="Posts by Roman" rel="author">
        <img
          alt=""
          src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcS6001cC2ejbwzQndTn-VX7NCmhWbom3WH5TDdzhFHeotIhLKZV"
          class="avatar avatar-30 photo"
          width="30"
          height="30"
        />
        <strong>Roman</strong>
      </a>
    </span>

    <time
      class="entry-date"
      datetime="2020-02-19T19:14:24"
      title="Feber 19, 2020, 7:14 pm"
      >vor 3 Tagen</time
    >
  </p>
</div>
<div>
  <p class="g1-meta entry-meta entry-byline entry-byline-with-avatar">
    <span class="entry-author">
      <span class="entry-meta-label">von</span>
      <a href="#" title="Posts by Hidden" rel="author">
        <img
          alt=""
          src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcS6001cC2ejbwzQndTn-VX7NCmhWbom3WH5TDdzhFHeotIhLKZV"
          class="avatar avatar-30 photo"
          width="30"
          height="30"
        />
        <strong>Hidden</strong>
      </a>
    </span>

    <time
      class="entry-date"
      datetime="2020-02-19T19:14:24"
      title="Feber 19, 2020, 7:14 pm"
      >vor 3 Tagen</time
    >
  </p>
</div>
<div>
  <p class="g1-meta entry-meta entry-byline entry-byline-with-avatar">
    <span class="entry-author">
      <span class="entry-meta-label">von</span>
      <a href="#" title="Posts by Krycha" rel="author">
        <img
          alt=""
          src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcS6001cC2ejbwzQndTn-VX7NCmhWbom3WH5TDdzhFHeotIhLKZV"
          class="avatar avatar-30 photo"
          width="30"
          height="30"
        />
        <strong>Krycha</strong>
      </a>
    </span>

    <time
      class="entry-date"
      datetime="2020-02-19T19:14:24"
      title="Feber 19, 2020, 7:14 pm"
      >vor 3 Tagen</time
    >
  </p>
</div>

.entry-byline .entry-date::before {
    display: inline-block;
    width: 3px;
    height: 3px;
    margin-right: 8px;
    vertical-align: middle;
    border-radius: 50%;
    content: "";
    background: currentColor;
}

function hideSelectedTimeBefore() {
    var x = document.querySelectorAll('a[title="Posts by Hidden"]');
    var i;
    for (i = 0; i < x.length; i++) {
        x[i].parentNode.parentNode.querySelector('time.entry-date').style.display = "none";
    }
}
hideSelectedTimeBefore()

time.hidden-before::before{
display: none;
}

var el = document.getElementById('div-03');

var r1 = el.closest("#div-02");  
// returns the element with the id=div-02

var r2 = el.closest("div div");  
// returns the closest ancestor which is a div in div, here it is the div-03 itself

var r3 = el.closest("article > div");  
// returns the closest ancestor which is a div and has a parent article, here it is the div-01

var r4 = el.closest(":not(div)");
// returns the closest ancestor which is not a div, here it is the outmost article

x[i].closest("time").classList.add("hidden-before::before");

x[i].closest("p.g1-meta").querySelector("time").classList.add("hidden-before::before");

x[i].closest("p.g1-meta").querySelector("time").classList.add("hidden-before");

.hidden-before::before{
display: none !important;
}