title: Time of creation of key in redis
body: <p>Suppose  I do this in redis at <code>13:30 20 Feb 2020</code>,</p>
  
  <pre><code>&gt; set foo "bar spam"
  OK
  </code></pre>
  
  <p>I want to get time of creation of <code>foo</code>. Is there something like </p>
  
  <pre><code>&gt; gettime foo
  13:30 20 Feb 2020
  </code></pre>
  
  <p>?</p>