title: How to get date of today + 00:00:00 in time
body: <p>I try to get today date + time(00:00:00)</p>
  <p>So I do it like this:</p>
  <pre><code> const startDate = DateTime.fromISO(params.start)
                    .startOf('day')
                    .toFormat('yyyy-LL-dd HH:mm:ss');
  </code></pre>
  <p>But If I do a <code>console.log()</code>:</p>
  <pre><code> console.log('startData',  startDate);
  </code></pre>
  <p>I get an <strong>error</strong>:</p>
  <blockquote>
  <p>line-chart.service.ts:22 startData Invalid DateTime</p>
  </blockquote>
  <p>So what I have to change?</p>
  <p>So I want it to use in here:</p>
  <pre><code>return this.sensorNodeService.cameraDataInInterval(
        16,
       startDate,
        '2021-01-20 23:59:59',
        '1'
      );
  </code></pre>