If we want to display the date as 25/12/2005 give DataFormatString="{0:dd/MM/yyyy}"
and also we have to set the HtmlEncode="False" to set the field value is not Html-encoded.
Example
... HtmlEncode="False" DataFormatString="{0:dd/MM/yyyy}"
DataField="recdate" HeaderText="CREATED DATE">"
For TemplateField, use the same format string within the Eval method of Template (May be ItemTemplate, EditItemTemplate, etc...) as the second argument
Example
Eval("recdate","{0:dd/MM/yyyy}")