diff --git a/samples/CommandableMixin.py b/samples/CommandableMixin.py
index 0fd75f2..2bce086 100755
--- a/samples/CommandableMixin.py
+++ b/samples/CommandableMixin.py
@@ -13,7 +13,7 @@ from bacpypes.core import run
 from bacpypes.errors import ExecutionError
 
 from bacpypes.object import AnalogValueObject, DateValueObject
-from bacpypes.primitivedata import Null
+from bacpypes.primitivedata import Null, Date
 from bacpypes.basetypes import PriorityValue, PriorityArray
 
 from bacpypes.app import BIPSimpleApplication
@@ -148,7 +148,7 @@ class CommandableDateValueObject(CommandableMixin, DateValueObject):
 
     def __init__(self, **kwargs):
         if _debug: CommandableDateValueObject._debug("__init__ %r", kwargs)
-        CommandableMixin.__init__(self, False, **kwargs)
+        CommandableMixin.__init__(self, None, **kwargs)
 
 #
 #   __main__
@@ -175,14 +175,18 @@ def main():
 
     # make a commandable analog value object, add to the device
     cavo1 = CommandableAnalogValueObject(
-        objectIdentifier=('analogValue', 1), objectName='Commandable AV 1'
+        objectIdentifier=('analogValue', 1), objectName='Commandable1',
         )
     if _debug: _log.debug("    - cavo1: %r", cavo1)
     this_application.add_object(cavo1)
 
-    # make a commandable binary value object, add to the device
+    # get the current date
+    today = Date().now()
+
+    # make a commandable date value object, add to the device
     cdvo2 = CommandableDateValueObject(
-        objectIdentifier=('dateValue', 1), objectName='Commandable2'
+        objectIdentifier=('dateValue', 1), objectName='Commandable2',
+        presentValue=today.value,
         )
     if _debug: _log.debug("    - cdvo2: %r", cdvo2)
     this_application.add_object(cdvo2)