title: Selecting a data frame within a time frame
body: <p>I'm practicing in colab and i have to select a data frame within a time period. The code in the picture below returns an empty data frame</p>
  <p><a href="https://i.stack.imgur.com/0cpNk.png" rel="nofollow noreferrer">What I am trying to do </a></p>
  <p>What is weird that for a different date like this it brings results.</p>
  <pre><code>dfPeriod = dfv[(dfv['date'] &gt;= '2021-01-20') &amp; (dfv['date'] &lt;= '2021-02-03')]
  </code></pre>
  <p>I dont know what I did wrong, it just looks like it works in one place and then it doesn't.</p>
  <p><a href="https://colab.research.google.com/drive/1eOQrWlFaqKHGHss5j_5hIqD3Ug0FKZmH?usp=sharing" rel="nofollow noreferrer">Colab</a></p>