 <p>Please use <code>theDate.ToString({format as you need}) </code>. May be format of date in your locale contains "bad" symbols(slashes).</p> <p>Formats can be found at <a href="http://msdn.microsoft.com/en-us/library/az4se3k1.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/az4se3k1.aspx</a></p>