title: Subtract one day from a particular date using MomentJs
body: <p>I get the second week of 2018 like this using moment.js</p>
  
  <pre><code> var date =moment([2018]).isoWeek(2).startOf('isoWeek').format('DD-MM-YYYY');
  </code></pre>
  
  <p>I need to get the date previous to the this date; i.e. the date previous to 
  08-01-2018</p>