diff --git a/etc/default_data.json b/etc/default_data.json
index 214970fae..18cd89ce5 100644
--- a/etc/default_data.json
+++ b/etc/default_data.json
@@ -830,7 +830,7 @@
             "companies": [
                 {
                     "company_name": "Cisco Systems",
-                    "end_date": "01-Jan-2013"
+                    "end_date": "2013-Jan-01"
                 },
                 {
                     "company_name": "PLUMgrid",
diff --git a/etc/default_data.schema.json b/etc/default_data.schema.json
index 6b104606e..e0bf92c95 100644
--- a/etc/default_data.schema.json
+++ b/etc/default_data.schema.json
@@ -31,7 +31,8 @@
                                     "type": "string"
                                 },
                                 "end_date": {
-                                    "type": ["string", "null"]
+                                    "type": ["string", "null"],
+                                    "pattern": "20\\d{2}-\\w{3}-[0-3]\\d"
                                 }
                             },
                             "additionalProperties": false