title: Birt - How to format default date parameter as yyyy-MM-dd
body: <p>I want my parameter default to be the first day of this year so I put in the formula:</p>
  
  <p>BirtDateTime.firstDayOfYear(BirtDateTime.today())</p>
  
  <p>And I'd like the default to be displayed in yyyy-MM-dd format so the users know what format to enter.</p>
  
  <p>However when I run the preview it shows the default as "Jan 1, 2012".</p>
  
  <p>Here is a screen shot of my parameter settings, and a screen shot of the report:</p>
  
  <p><img src="https://i.stack.imgur.com/kkwRO.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/vxahw.png" alt="enter image description here"></p>