Date only because hard to do time with no time

letsencrypt/cli.py

@@ -303,9 +303,9 @@ def _auth_from_domains(le_client, config, domains, plugins):
     _report_new_cert(lineage.cert)
     reporter_util = zope.component.getUtility(interfaces.IReporter)
     reporter_util.add_message(
-        "Your certificate will expire at {0}. To obtain a new version of the "
+        "Your certificate will expire on {0}. To obtain a new version of the "
         "certificate in the future, simply run this client again.".format(
-            lineage.notafter().ctime()),
+            lineage.notafter().date()),
         reporter_util.MEDIUM_PRIORITY)
 
     return lineage