title: Change the start of the year in moment.js
body: <p>I am using momentJS for date calculations. </p>
  
  <p>Here I want to change start of year for weeks calculation.</p>
  
  <p>For me start of year will be 1-nov and end will be 31-oct.</p>
  
  <p>or any other JS date lib that allows me to do the same.</p>