title: What is the Date format in the Notion API?
body: <pre><code>{
      &quot;object&quot;: &quot;error&quot;,
      &quot;status&quot;: 400,
      &quot;code&quot;: &quot;validation_error&quot;,
      &quot;message&quot;: &quot;{Bal has an invalid date value.&quot;
  }
  </code></pre>
  <p>I tried many types and always failed.Why not just write it in the document.</p>
  <pre><code>2021/05/14
  2021/14/05
  2021/5/14
  2021/05/14 00:00:00
  </code></pre>