diff -r 7fb76e862ad1 -r ecdeb89dfad2 roundup/cgi/templating.py
--- a/roundup/cgi/templating.py	Thu Jun 26 19:22:33 2014 +0400
+++ b/roundup/cgi/templating.py	Sun Aug 24 16:13:40 2014 +0400
@@ -1845,7 +1845,13 @@
     def format(self, strftime_format):
         '''Print date exactly as supplied strftime_format.
         '''
-        return self._value.format(strftime_format)
+        if not self.is_view_ok():
+            return self._('[hidden]')
+
+        if not self._value:
+            return ''
+        else:
+            return self._value.format(strftime_format)
 
     def local(self, offset):
         """ Return the date/time as a local (timezone offset) date/time.