title: Query: Assigning error datetime2
body: <p>I want to assign <code>'1392-04-31'</code> using this code:</p>
  
  <pre><code>DECLARE @t DATETIME
  SET @t = '92-04-31'
  </code></pre>
  
  <p>I see this error:</p>
  
  <p><code>Conversion failed when converting date and/or time from character string.</code></p>
  
  <p>Any one know why?</p>