diff --git a/lib/format.js b/lib/format.js
index d184564..5a0c03c 100644
--- a/lib/format.js
+++ b/lib/format.js
@@ -9,7 +9,7 @@ module.exports = format
 
 function format(crt)
 {
-  return [subject, pem].map(function(cb)
+  return [subject, valid, pem].map(function(cb)
   {
     return cb(crt)
   })
@@ -23,9 +23,19 @@ function pem(crt)
 
 function subject(crt)
 {
-  return crt.subject.attributes.map(function(rdn)
+  return 'Subject: ' + crt.subject.attributes.map(function(rdn)
   {
     return '/' + (rdn.shortName || rdn.name)+ '=' + rdn.value
   })
   .join('')
 }
+
+function valid(crt)
+{
+  var x = crt.validity
+  var a = []
+  for(var k in x)
+    a.push(x[k].toISOString())
+  return 'Valid: ' +
+   a.join(' - ')
+}