title: how to reformat date in txt file using bash
body: <p>I have a long txt file, t1.txt. For instance I have the following text:</p>
  
  <pre><code>"2019-03-11T12:20:22.330Z"
  plenty of text ...
  "2019-03-11T12:20:43.082Z"
  plenty of text ...
  </code></pre>
  
  <p>I would like to reformat the date stamp to resemble something like </p>
  
  <pre><code>Day of the week
  time (as in 13.48 for example)
  plenty of text ...
  </code></pre>
  
  <p>Is this at all possible to do in bash?</p>