diff --git a/artcommon/artcommonlib/build_util.py b/artcommon/artcommonlib/build_util.py
index a05355373..879f0b837 100644
--- a/artcommon/artcommonlib/build_util.py
+++ b/artcommon/artcommonlib/build_util.py
@@ -1,10 +1,7 @@
-from datetime import datetime
 from typing import List, Optional, Iterable, Dict
-
 from artcommonlib import logutil
 from artcommonlib.model import Missing
 from artcommonlib.release_util import isolate_assembly_in_release
-from doozerlib.release_schedule import ReleaseSchedule
 
 LOGGER = logutil.get_logger(__name__)
 
@@ -61,25 +58,10 @@ def canonical_builders_enabled(canonical_builders_from_upstream, runtime) -> boo
         # Default case: override using ART's config
         return False
 
-    elif canonical_builders_from_upstream == 'auto':
-        # canonical_builders_from_upstream set to 'auto': rebase according to release schedule
-        try:
-            feature_freeze_date = ReleaseSchedule(runtime).get_ff_date()
-            return datetime.now() < feature_freeze_date
-        except ChildProcessError:
-            # Could not access Gitlab: display a warning and fallback to default
-            LOGGER.warning('Failed retrieving release schedule from Gitlab: fallback to using ART\'s config')
-            return False
-        except ValueError as e:
-            # A GITLAB token env var was not provided: display a warning and fallback to default
-            LOGGER.warning(f'Fallback to default ART config: {e}')
-            return False
-
-    elif canonical_builders_from_upstream in ['on', True]:
-        # yaml parser converts bare 'on' to True, same for 'off' and False
+    elif canonical_builders_from_upstream is True:
         return True
 
-    elif canonical_builders_from_upstream in ['off', False]:
+    elif canonical_builders_from_upstream is False:
         return False
 
     else:
diff --git a/doozer/doozerlib/release_schedule.py b/doozer/doozerlib/release_schedule.py
deleted file mode 100644
index 1efe40f17..000000000
--- a/doozer/doozerlib/release_schedule.py
+++ /dev/null
@@ -1,49 +0,0 @@
-from datetime import datetime
-import os
-import threading
-
-import yaml
-
-from doozerlib import gitdata
-
-
-class ReleaseSchedule:
-    """
-    This class is a Singleton. Only at first object construction, it will clone ocp-release-schedule repo inside Doozer
-    working directory, parse and store yaml data related to the current OCP version
-    """
-
-    _instance = None
-    _lock = threading.Lock()
-
-    def __new__(cls, runtime):
-        if cls._instance is None:
-            with cls._lock:
-                # Another thread could have created the instance before the lock was acquired
-                # So check that the instance is still nonexistent.
-                if cls._instance is None:
-                    instance = super(ReleaseSchedule, cls).__new__(cls)
-                    instance.initialize(runtime)
-                    cls._instance = instance
-        return cls._instance
-
-    def initialize(self, runtime):
-        if 'GITLAB_TOKEN' not in os.environ:
-            raise ValueError('A GITLAB_TOKEN env var must be defined')
-
-        # Clone ocp-release-schedule in doozer working dir
-        git_data = gitdata.GitData(
-            data_path=f'https://oauth2:{os.environ["GITLAB_TOKEN"]}@gitlab.cee.redhat.com/ocp-release-schedule/schedule.git',
-            clone_dir=runtime.working_dir
-        )
-
-        # Parse and store relevant yaml
-        major = runtime.group_config.vars['MAJOR']
-        minor = runtime.group_config.vars['MINOR']
-        config_file = f'{git_data.data_dir}/schedules/{major}.{minor}.yaml'
-        with open(config_file) as f:
-            self.schedule_data = yaml.safe_load(f.read())
-
-    def get_ff_date(self) -> datetime:
-        event = next(item for item in self.schedule_data['events'] if item["name"] == "feature-freeze")
-        return datetime.strptime(event['date'], '%Y-%m-%dT%H:00:00-00:00')
diff --git a/doozer/tests/test_distgit/test_image_distgit/test_image_distgit.py b/doozer/tests/test_distgit/test_image_distgit/test_image_distgit.py
index 1375530d3..32efaedaa 100644
--- a/doozer/tests/test_distgit/test_image_distgit/test_image_distgit.py
+++ b/doozer/tests/test_distgit/test_image_distgit/test_image_distgit.py
@@ -610,9 +610,7 @@ def test_generate_osbs_image_config_with_cachito_enabled(self, is_dir: Mock):
         self.assertEqual(actual["remote_sources"][0]["remote_source"]["pkg_managers"], ["gomod"])
         self.assertEqual(actual["remote_sources"][0]["remote_source"]["flags"], ["gomod-vendor-check"])
 
-    @patch('artcommonlib.build_util.datetime')
-    @patch('artcommonlib.build_util.ReleaseSchedule')
-    def test_canonical_builders_enabled(self, release_schedule, mock_datetime):
+    def test_canonical_builders_enabled(self):
         # canonical_builders_from_upstream not defined
         self.img_dg.config.canonical_builders_from_upstream = Missing
         self.assertEqual(False, self.img_dg._canonical_builders_enabled())
@@ -627,23 +625,6 @@ def test_canonical_builders_enabled(self, release_schedule, mock_datetime):
         self.img_dg.runtime.group_config.canonical_builders_from_upstream = True
         self.assertEqual(False, self.img_dg._canonical_builders_enabled())
 
-        # canonical_builders_from_upstream = 'on' in image config (override)
-        self.img_dg.config.canonical_builders_from_upstream = 'on'
-        self.img_dg.runtime.group_config.canonical_builders_from_upstream = False
-        self.assertEqual(True, self.img_dg._canonical_builders_enabled())
-
-        # canonical_builders_from_upstream = 'auto'; current time < feature freeze
-        self.img_dg.config.canonical_builders_from_upstream = 'auto'
-        release_schedule.return_value.get_ff_date.return_value = datetime.datetime(2023, 6, 1, 10, 30, 15)
-        mock_datetime.now.return_value = datetime.datetime(2023, 5, 1, 10, 30, 15)
-        self.assertEqual(True, self.img_dg._canonical_builders_enabled())
-
-        # canonical_builders_from_upstream = 'auto'; current time > feature freeze
-        self.img_dg.config.canonical_builders_from_upstream = 'auto'
-        release_schedule.return_value.get_ff_date.return_value = datetime.datetime(2023, 6, 1, 10, 30, 15)
-        mock_datetime.now.return_value = datetime.datetime(2023, 7, 1, 10, 30, 15)
-        self.assertEqual(False, self.img_dg._canonical_builders_enabled())
-
     def test_update_image_config(self):
         self.img_dg.metadata = MagicMock()
         # 'when' clause matching upstream rhel version: override
diff --git a/ocp-build-data-validator/validator/json_schemas/assembly_group_config.schema.json b/ocp-build-data-validator/validator/json_schemas/assembly_group_config.schema.json
index cd4e7be51..e618e0c61 100644
--- a/ocp-build-data-validator/validator/json_schemas/assembly_group_config.schema.json
+++ b/ocp-build-data-validator/validator/json_schemas/assembly_group_config.schema.json
@@ -228,8 +228,7 @@
     },
     "urls-": {},
     "canonical_builders_from_upstream": {
-      "description": "Assert our base images, or listen to upstream",
-      "enum": [true, false, "auto", "off", "no", "on", "yes"]
+      "type": "boolean"
     },
     "canonical_builders_from_upstream?": {
       "$ref": "#/properties/canonical_builders_from_upstream"
diff --git a/ocp-build-data-validator/validator/json_schemas/image_config.base.schema.json b/ocp-build-data-validator/validator/json_schemas/image_config.base.schema.json
index 4b3d4b548..bd6cbf0fd 100644
--- a/ocp-build-data-validator/validator/json_schemas/image_config.base.schema.json
+++ b/ocp-build-data-validator/validator/json_schemas/image_config.base.schema.json
@@ -207,8 +207,7 @@
     },
     "content-": {},
     "canonical_builders_from_upstream": {
-      "description": "Override the facility to adhere to upstream suggestions for base images",
-      "enum": [true, false, "auto", "off", "no", "on", "yes"]
+      "type": "boolean"
     },
     "canonical_builders_from_upstream?": {
       "$ref": "#/properties/canonical_builders_from_upstream"