title: "svn: Syntax error in revision argument" for date formats
body: <p>Can anybody tell me using svn on OS 10.7.3 with a <strong>tcsh</strong> shell what date formats are accepted?  I'm attempting to do an <code>svn up -r {DATE}</code> and every time I get this:</p>
  
  <pre><code>svn: Syntax error in revision argument
  </code></pre>
  
  <p>The formats described here are not accepted:
  <a href="http://svnbook.red-bean.com/en/1.2/svn.tour.revs.html" rel="nofollow noreferrer">http://svnbook.red-bean.com/en/1.2/svn.tour.revs.html</a></p>
  
  <p>My last attempt was to try an checkout:</p>
  
  <pre><code>svn checkout --revision {2012-02-17} svn+ssh://blah/blah blah
  svn: Syntax error in revision argument '2012-02-17'
  </code></pre>
  
  <p>Thanks</p>