diff --git a/runtime/src/main/java/org/onosproject/yang/runtime/helperutils/YangApacheUtils.java b/runtime/src/main/java/org/onosproject/yang/runtime/helperutils/YangApacheUtils.java
index 8cf6fc9..905d75a 100644
--- a/runtime/src/main/java/org/onosproject/yang/runtime/helperutils/YangApacheUtils.java
+++ b/runtime/src/main/java/org/onosproject/yang/runtime/helperutils/YangApacheUtils.java
@@ -50,7 +50,7 @@
     private static final String MAVEN = "mvn:";
     private static final String JAR = ".jar";
     private static final String USER_DIRECTORY = "user.dir";
-    private static final String DATE_FORMAT = "yyyy-mm-dd";
+    private static final String DATE_FORMAT = "yyyy-MM-dd";
     private static final Logger log = getLogger(YangApacheUtils.class);
 
     // Forbid construction.
diff --git a/runtime/src/test/java/org/onosproject/yang/runtime/impl/DefaultYangModelRegistryTest.java b/runtime/src/test/java/org/onosproject/yang/runtime/impl/DefaultYangModelRegistryTest.java
index f3af240..9a31e07 100644
--- a/runtime/src/test/java/org/onosproject/yang/runtime/impl/DefaultYangModelRegistryTest.java
+++ b/runtime/src/test/java/org/onosproject/yang/runtime/impl/DefaultYangModelRegistryTest.java
@@ -39,10 +39,10 @@
             "org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf" +
                     ".network3.rev20151208.IetfNetwork3";
 
-    private static final String SCHEMA_NAME_4_14 = "ietf-network4@2014-00-08";
-    private static final String SCHEMA_NAME_4_15 = "ietf-network4@2015-00-08";
-    private static final String SCHEMA_NAME_4_16 = "ietf-network4@2016-00-08";
-    private static final String SCHEMA_NAME_4_17 = "ietf-network4@2017-00-08";
+    private static final String SCHEMA_NAME_4_14 = "ietf-network4@2014-12-08";
+    private static final String SCHEMA_NAME_4_15 = "ietf-network4@2015-12-08";
+    private static final String SCHEMA_NAME_4_16 = "ietf-network4@2016-12-08";
+    private static final String SCHEMA_NAME_4_17 = "ietf-network4@2017-12-08";
     private static final String SCHEMA_NAME_4 = "ietf-network4";
     private static final String INTERFACE_NAME_REV_14 =
             "org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf" +
@@ -61,7 +61,7 @@
                     ".network4.IetfNetwork4";
 
     private static final String CHECK = "check";
-    private static final String DATE_NAMESPACE = "2015-00-08";
+    private static final String DATE_NAMESPACE = "2015-12-08";
     private static final String NAMESPACE =
             "urn:ietf:params:xml:ns:yang:ietf-network4:check:namespace";