title: Display month based on days
body: <p>How can I display months based on the first Monday of each month??</p>
  <p>For example August 21 should be from 02/08/2021 - 05/09/2021</p>
  <p>I have calculated the iso week based on WEEKNUM([Date],21), so  what I want basically is August 21 to include Iso week 31-35</p>