diff --git a/source/includes/fact-iso-date-objects.rst b/source/includes/fact-iso-date-objects.rst
index 64bdbccc4c7..f5c0cf65b55 100644
--- a/source/includes/fact-iso-date-objects.rst
+++ b/source/includes/fact-iso-date-objects.rst
@@ -1,8 +1,11 @@
+.. versionchanged:: 3.6
+
 The argument must be a valid :ref:`expression
 <aggregation-expressions>` that resolves to one of the following:
 
-- A :ref:`Date <document-bson-type-date>` or
-  :ref:`Timestamp <document-bson-type-timestamp>`.
+- A :ref:`Date <document-bson-type-date>`, a
+  :ref:`Timestamp <document-bson-type-timestamp>`,
+  or an :ref:`ObjectID <document-bson-object-id>`.
 
 - A document of the following form:
 
@@ -24,9 +27,10 @@ The argument must be a valid :ref:`expression
 
        - The date to which the operator is applied.
          ``<dateExpression>`` must be a valid :ref:`expression
-         <aggregation-expressions>` that resolves to either a
-         :ref:`Date <document-bson-type-date>` or a
-         :ref:`Timestamp <document-bson-type-timestamp>`.
+         <aggregation-expressions>` that resolves to a
+         :ref:`Date <document-bson-type-date>`, a
+         :ref:`Timestamp <document-bson-type-timestamp>`,
+         or an :ref:`ObjectID <document-bson-object-id>`.
 
      * - ``timezone``
 
diff --git a/source/reference/operator/aggregation/dateToParts.txt b/source/reference/operator/aggregation/dateToParts.txt
index 7a945cb14ae..c91a2dea2f1 100644
--- a/source/reference/operator/aggregation/dateToParts.txt
+++ b/source/reference/operator/aggregation/dateToParts.txt
@@ -35,7 +35,7 @@ Definition
 
       { 
           $dateToParts: {
-              'date' : <isoDateExpression>,
+              'date' : <dateExpression>,
               'timezone' : <timezone>,
               'iso8601' : <boolean>
           }
@@ -53,10 +53,14 @@ Definition
 
       * - ``date``
         - Required 
-        - The input date for which to return parts.
-          ``<isoDateExpression>`` can be any
-          :ref:`expression <aggregation-expressions>` that evaluates to
-          a BSON Date, Timestamp or ObjectID value. For more
+        - .. versionchanged:: 3.6
+
+          The input date for which to return parts.
+          ``<dateExpression>`` can be any
+          :ref:`expression <aggregation-expressions>` that resolves to a
+          :ref:`Date <document-bson-type-date>`, a
+          :ref:`Timestamp <document-bson-type-timestamp>`, or an
+          :ref:`ObjectID <document-bson-object-id>`. For more
           information on expressions, see
           :ref:`aggregation-expressions`.
 
diff --git a/source/reference/operator/aggregation/dateToString.txt b/source/reference/operator/aggregation/dateToString.txt
index 35a28b2c6b1..6a4f89defce 100644
--- a/source/reference/operator/aggregation/dateToString.txt
+++ b/source/reference/operator/aggregation/dateToString.txt
@@ -48,10 +48,13 @@ Definition
 
       * - ``date``
 
-        - The date to convert to string. ``<dateExpression>`` must be a
+        - .. versionchanged:: 3.6
+
+          The date to convert to string. ``<dateExpression>`` must be a
           valid :ref:`expression <aggregation-expressions>` that
-          resolves to either a :ref:`Date <document-bson-type-date>` or
-          a :ref:`Timestamp <document-bson-type-timestamp>`.
+          resolves to a :ref:`Date <document-bson-type-date>`, a
+          :ref:`Timestamp <document-bson-type-timestamp>`, or an
+          :ref:`ObjectID <document-bson-object-id>`.
 
       * - ``timezone``