title: How to modify week number starting in a specific day using fullcalendar plugin
body: <p>I would like to start the week number from 1 when I specify a start date. Is it possible?</p>
  
  <p>For example:
  Week number usually starts at 1 on January first
  I want my calendar to start week number at 1 from July 4/2016 and show weeks upto 1/December/2017.</p>