diff --git a/odoo/addons/test_new_api/models.py b/odoo/addons/test_new_api/models.py
index a6ce5fe2e37..6d90119aba7 100644
--- a/odoo/addons/test_new_api/models.py
+++ b/odoo/addons/test_new_api/models.py
@@ -297,6 +297,7 @@ class MixedModel(models.Model):
     number = fields.Float(digits=(10, 2), default=3.14)
     number2 = fields.Float(digits='New API Precision')
     date = fields.Date()
+    moment = fields.Datetime()
     now = fields.Datetime(compute='_compute_now')
     lang = fields.Selection(string='Language', selection='_get_lang')
     reference = fields.Reference(string='Related Document',
diff --git a/odoo/addons/test_new_api/tests/test_new_fields.py b/odoo/addons/test_new_api/tests/test_new_fields.py
index c485bb21252..692245c849c 100644
--- a/odoo/addons/test_new_api/tests/test_new_fields.py
+++ b/odoo/addons/test_new_api/tests/test_new_fields.py
@@ -577,9 +577,41 @@ class TestFields(common.TransactionCase):
         with self.assertRaises(ValueError):
             record.date = '12-5-1'
 
+        # check filtered_domain
+        self.assertTrue(record.filtered_domain([('date', '<', '2012-05-02')]))
+        self.assertTrue(record.filtered_domain([('date', '<', date(2012, 5, 2))]))
+        self.assertTrue(record.filtered_domain([('date', '<', datetime(2012, 5, 2, 12, 0, 0))]))
+
+    def test_21_datetime(self):
+        """ test datetime fields """
         for i in range(0, 10):
             self.assertEqual(fields.Datetime.now().microsecond, 0)
 
+        record = self.env['test_new_api.mixed'].create({})
+
+        # assign falsy value
+        record.moment = None
+        self.assertFalse(record.moment)
+
+        # assign string
+        record.moment = '2012-05-01'
+        self.assertEqual(record.moment, datetime(2012, 5, 1))
+        record.moment = '2012-05-01 06:00:00'
+        self.assertEqual(record.moment, datetime(2012, 5, 1, 6))
+        with self.assertRaises(ValueError):
+            record.moment = '12-5-1'
+
+        # assign date or datetime
+        record.moment = date(2012, 5, 1)
+        self.assertEqual(record.moment, datetime(2012, 5, 1))
+        record.moment = datetime(2012, 5, 1, 6)
+        self.assertEqual(record.moment, datetime(2012, 5, 1, 6))
+
+        # check filtered_domain
+        self.assertTrue(record.filtered_domain([('moment', '<', '2012-05-02')]))
+        self.assertTrue(record.filtered_domain([('moment', '<', date(2012, 5, 2))]))
+        self.assertTrue(record.filtered_domain([('moment', '<', datetime(2012, 5, 1, 12, 0, 0))]))
+
     def test_21_date_datetime_helpers(self):
         """ test date/datetime fields helpers """
         _date = fields.Date.from_string("2077-10-23")
diff --git a/odoo/models.py b/odoo/models.py
index d917558c9e1..1ed5e515346 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -5133,9 +5133,15 @@ Record ids: %(records)s
                         else:
                             data = data and data.ids or [False]
                     else:
-                        data = [
-                            (isinstance(x, datetime.date) and x.strftime('%Y-%m-%d %H:%M:%S')) or
-                            x for x in data]
+                        true_data = next((d for d in data if d), None)
+                        if isinstance(true_data, datetime.date):
+                            # convert all date and datetime values to datetime
+                            normalize = Datetime.to_datetime
+                            if isinstance(value, (list, tuple)):
+                                value = [normalize(v) for v in value]
+                            else:
+                                value = normalize(value)
+                            data = [normalize(d) for d in data]
                     if comparator in ('in', 'not in'):
                         if not (isinstance(value, list) or isinstance(value, tuple)):
                             value = [value]
@@ -6100,4 +6106,4 @@ def lazy_name_get(self):
 
 # keep those imports here to avoid dependency cycle errors
 from .osv import expression
-from .fields import Field
+from .fields import Field, Datetime