title: Grails 2.5.6 Date type error when upgrading from Grals 2.1.1
body: <p>I've upgraded my grails app from 2.1.1 to 2.5.6 and I'm now getting a problem with dates.</p>
  
  <p>I have an MS-SQL database with a list of dates stored as <code>date</code> types. So they appear as 'yyyy-mm-dd' in the database.</p>
  
  <p>My domain class is:</p>
  
  <pre><code>class Bank_holidays {
  
      Date date
  
      static constraints = {
          date format: 'dd-mm-yyyy'        
      }
      static mapping = {
          version false        
      }
  }
  </code></pre>
  
  <p>And in my controller I am simply doing:</p>
  
  <pre><code>List bankHolidays = Bank_holidays.list()
  </code></pre>
  
  <p>But since upgrading to Grails 2.5.6 (from Grails 2.1.1) I am now hitting the following error:</p>
  
  <p>Timestamp format must be <code>yyyy-mm-dd hh:mm:ss[.fffffffff]</code></p>
  
  <p>How do I resolve this error now in the later version of Grails?</p>