create a range of days

start = moment('7/31/2017')
end = moment('10/31/2017')

function format(m) {
  return m.format('MM/DD/YYYY')
}

for (var i = 0; i < end.diff(start, 'day'); i += 7) {
  startOfWeek = moment(start).add(i, 'day').isoWeekday(1)
  endOfWeek = moment(start).add(i, 'day').isoWeekday(5)
  console.log(format(startOfWeek) + ' - ' + format(endOfWeek))
}