title: When I use strftime in awk, it adds one hour. How to fix
body: <p>When I try to convert seconds to show <code>H:M:S</code>, <code>strftime</code> in <code>awk</code> adds one hour.<br>
  Why and how to fix?<br>
  Eks</p>
  
  <pre><code>echo "3600" | awk '{print strftime("%T",$1)}'
  02:00:00  # Here i would like to see 01:00:00
  
  echo "60" | awk '{print strftime("%T",$1)}'
  01:01:00  # Here i would like to see 00:01:00
  </code></pre>
  
  <p>This gives correct result, but is this normal to do?</p>
  
  <pre><code>echo "72" | awk '{print strftime("%T",int($1)-3600)}'
  00:01:12
  </code></pre>
  
  <hr>
  
  <p>Edit: Here is a workaround, but I still like to now why strftime does not give me correct answer.</p>
  
  <pre><code>echo "3958" | awk '{h=int($0/3600);m=int(($0-h*3600)/60);s=($0-h*3600-m*60);printf "%02d:%02d:%02d\n",h,m,s}'
  01:05:58
  
  echo "64" | awk '{h=int($0/3600);m=int(($0-h*3600)/60);s=($0-h*3600-m*60);printf "%02d:%02d:%02d\n",h,m,s}'
  00:01:04
  </code></pre>