diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/types/DataTypes.java b/sql/catalyst/src/main/java/org/apache/spark/sql/types/DataTypes.java
index 9454c3c259..90a2baf130 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/types/DataTypes.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/types/DataTypes.java
@@ -54,11 +54,6 @@ public class DataTypes {
    */
   public static final DataType TimestampType = TimestampType$.MODULE$;
 
-  /**
-   * Gets the TimestampNTZType object.
-   */
-  public static final DataType TimestampNTZType = TimestampNTZType$.MODULE$;
-
   /**
    * Gets the CalendarIntervalType object.
    */
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/TimestampNTZType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/TimestampNTZType.scala
index 99c29e444c..03b975fb5f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/TimestampNTZType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/TimestampNTZType.scala
@@ -29,10 +29,8 @@ import org.apache.spark.annotation.Unstable
  * To represent an absolute point in time, use `TimestampType` instead.
  *
  * Please use the singleton `DataTypes.TimestampNTZType` to refer the type.
- * @since 3.3.0
  */
-@Unstable
-class TimestampNTZType private() extends AtomicType {
+private[spark] class TimestampNTZType private() extends AtomicType {
   /**
    * Internally, a timestamp is stored as the number of microseconds from
    * the epoch of 1970-01-01T00:00:00.000000(Unix system time zero)
@@ -58,8 +56,5 @@ class TimestampNTZType private() extends AtomicType {
  * the TimestampNTZType class. Otherwise, the companion object would be of type
  * "TimestampNTZType" in byte code. Defined with a private constructor so the companion
  * object is the only possible instantiation.
- *
- * @since 3.3.0
  */
-@Unstable
-case object TimestampNTZType extends TimestampNTZType
+private[spark] case object TimestampNTZType extends TimestampNTZType