diff --git a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAddMonths.java b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAddMonths.java
index 82e877219ed0..5190f40d46da 100644
--- a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAddMonths.java
+++ b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAddMonths.java
@@ -53,9 +53,9 @@
         + "Returns the date that is num_months after start_date.",
     extended = "start_date is a string or timestamp indicating a valid date. "
         + "num_months is a number. output_date_format is an optional String which specifies the format for output.\n"
-        + "The default output format is 'YYYY-MM-dd'.\n"
+        + "The default output format is 'yyyy-MM-dd'.\n"
         + "Example:\n  > SELECT _FUNC_('2009-08-31', 1) FROM src LIMIT 1;\n" + " '2009-09-30'."
-        + "\n  > SELECT _FUNC_('2017-12-31 14:15:16', 2, 'YYYY-MM-dd HH:mm:ss') LIMIT 1;\n"
+        + "\n  > SELECT _FUNC_('2017-12-31 14:15:16', 2, 'yyyy-MM-dd HH:mm:ss') LIMIT 1;\n"
         + "'2018-02-28 14:15:16'.\n")
 @NDV(maxNdv = 250) // 250 seems to be reasonable upper limit for this
 public class GenericUDFAddMonths extends GenericUDF {
diff --git a/ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFAddMonths.java b/ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFAddMonths.java
index be8b9d14a0f4..e0ad69428c29 100644
--- a/ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFAddMonths.java
+++ b/ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDFAddMonths.java
@@ -43,10 +43,10 @@
  */
 public class TestGenericUDFAddMonths {
 
-  private final Text fmtTextWithTime = new Text("YYYY-MM-dd HH:mm:ss");
-  private final Text fmtTextWithTimeAndms = new Text("YYYY-MM-dd HH:mm:ss.SSS");
-  private final Text fmtTextWithoutTime = new Text("YYYY-MM-dd");
-  private final Text fmtTextInvalid = new Text("YYYY-abcdz");
+  private final Text fmtTextWithTime = new Text("yyyy-MM-dd HH:mm:ss");
+  private final Text fmtTextWithTimeAndms = new Text("yyyy-MM-dd HH:mm:ss.SSS");
+  private final Text fmtTextWithoutTime = new Text("yyyy-MM-dd");
+  private final Text fmtTextInvalid = new Text("yyyy-abcdz");
 
   @Test
   public void testAddMonthsInt() throws HiveException {
diff --git a/ql/src/test/results/clientpositive/llap/udf_add_months.q.out b/ql/src/test/results/clientpositive/llap/udf_add_months.q.out
index 61f9e07fad02..919d8039252d 100644
--- a/ql/src/test/results/clientpositive/llap/udf_add_months.q.out
+++ b/ql/src/test/results/clientpositive/llap/udf_add_months.q.out
@@ -9,11 +9,11 @@ POSTHOOK: query: DESCRIBE FUNCTION EXTENDED add_months
 POSTHOOK: type: DESCFUNCTION
 add_months(start_date, num_months, output_date_format) - Returns the date that is num_months after start_date.
 start_date is a string or timestamp indicating a valid date. num_months is a number. output_date_format is an optional String which specifies the format for output.
-The default output format is 'YYYY-MM-dd'.
+The default output format is 'yyyy-MM-dd'.
 Example:
   > SELECT add_months('2009-08-31', 1) FROM src LIMIT 1;
  '2009-09-30'.
-  > SELECT add_months('2017-12-31 14:15:16', 2, 'YYYY-MM-dd HH:mm:ss') LIMIT 1;
+  > SELECT add_months('2017-12-31 14:15:16', 2, 'yyyy-MM-dd HH:mm:ss') LIMIT 1;
 '2018-02-28 14:15:16'.
 
 Function class:org.apache.hadoop.hive.ql.udf.generic.GenericUDFAddMonths