DOCSP-32377 ObjectId with Custom Date (#7059)

* DOCSP-32377 ObjectId with Custom Date

* *

* *

* JA feedback

Author: ajhuh-mdb

source/reference/method/ObjectId.txt

@@ -121,6 +121,49 @@ The method returns:
 
    507f191e810c19729de860ea
 
+Specify a Date
+~~~~~~~~~~~~~~
+
+You can use a custom :ref:`document-bson-type-date` to specify an ObjectId. 
+
+.. procedure::
+   :style: normal
+
+   .. step:: Set a variable for your specified date
+
+      Internally, Date objects are stored as signed 
+      64-bit integer that represents the number of milliseconds since the 
+      :wikipedia:`Unix epoch`. To learn more, see :method:`Date()`.
+
+      .. code-block:: javascript
+         :copyable: true
+         
+         myDate = new Date( "2024-01-01" )
+
+   .. step:: Convert your Date object to seconds
+      
+      .. code-block:: javascript
+         :copyable: true
+         
+         timestamp = Math.floor( myDate / 1000 )
+
+   .. step:: Set your new ObjectId with ``timestamp`` as the argument 
+
+      You can verify the Date by using :method:`ObjectId.getTimestamp()`.
+
+      .. io-code-block::
+         :copyable: true
+         
+         .. input::
+            :language: javascript
+
+            newObjectId = ObjectId(timestamp) 
+            
+         .. output::
+            :language: javascript
+
+            ObjectId("6592008029c8c3e4dc76256c")
+
 Specify an Integer String
 ~~~~~~~~~~~~~~~~~~~~~~~~~