text: const moment = require('moment');
  
  let unixStartDate  = moment();
  
  let current        = moment(unixStartDate);
  let currentStartOf = moment(current).startOf('quarter');
  let currentEndOf   = moment(current).  endOf('quarter').add(1, 'day');
  
  let previous        = moment(current).subtract(1, 'quarter');
  let previousStartOf = moment(previous).startOf('quarter');
  let previousEndOf   = moment(previous).  endOf('quarter').add(1, 'day');
  
  
  