title: Sort by month value in ssrs
body: <p>I have a pretty awkward setup in SSRS with custom grouping options (i.e. by office, seller, buyer etc.). In example, user can group items by year and then by month. The outcome of the report is then:</p>
  
  <pre><code>Gr1. | Gr2.
  2015 | April
  2015 | August
  2015 | February
  2015 | January 
  and so on... 
  </code></pre>
  
  <p>So both columns are alphabetically ordered, which works excellent for all custom grouping options but months - which should have their own logic for sorting. How could I implement that?</p>