diff --git a/release-notes/VERSION b/release-notes/VERSION
index 667a71f27d..176ef14a48 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -3,6 +3,8 @@ Version: 2.3.3 (xx-xxx-2014)
 
 #420: Remove 'final' modifier from `BeanDeserializerBase.deserializeWithType`
  (requested by Ghoughpteighbteau@github)
+#423: Fix `CalendarSerializer` to work with custom format
+ (repored by sergeymetallic@github)
 
 ------------------------------------------------------------------------
 === History: ===
diff --git a/src/main/java/com/fasterxml/jackson/databind/ser/std/CalendarSerializer.java b/src/main/java/com/fasterxml/jackson/databind/ser/std/CalendarSerializer.java
index 653d7cf841..0e1ca28d5e 100644
--- a/src/main/java/com/fasterxml/jackson/databind/ser/std/CalendarSerializer.java
+++ b/src/main/java/com/fasterxml/jackson/databind/ser/std/CalendarSerializer.java
@@ -49,7 +49,7 @@ public void serialize(Calendar value, JsonGenerator jgen, SerializerProvider pro
         } else if (_customFormat != null) {
             // 21-Feb-2011, tatu: not optimal, but better than alternatives:
             synchronized (_customFormat) {
-                jgen.writeString(_customFormat.format(value));
+                jgen.writeString(_customFormat.format(value.getTime()));
             }
         } else {
             provider.defaultSerializeDateValue(value.getTime(), jgen);
diff --git a/src/test/java/com/fasterxml/jackson/databind/ser/TestDateSerialization.java b/src/test/java/com/fasterxml/jackson/databind/ser/TestDateSerialization.java
index c7f3a77477..de210cef2d 100644
--- a/src/test/java/com/fasterxml/jackson/databind/ser/TestDateSerialization.java
+++ b/src/test/java/com/fasterxml/jackson/databind/ser/TestDateSerialization.java
@@ -158,7 +158,7 @@ public void testDateWithJsonFormat() throws Exception
         
         // and for [Issue#423] as well:
         json = mapper.writer().with(getUTCTimeZone()).writeValueAsString(new CalendarAsStringBean(0L));
-        assertEquals("{\"date\":\"1970-01-01\"}", json);
+        assertEquals("{\"value\":\"1970-01-01\"}", json);
     }
 
     /**