diff --git a/dev/common/dependency_bumper.py b/dev/common/dependency_bumper.py
index 0f33ddc21b..b2d9f1e7fa 100644
--- a/dev/common/dependency_bumper.py
+++ b/dev/common/dependency_bumper.py
@@ -192,15 +192,16 @@ def main():
 
         # make a unique checkout for this new patch
         branch_checkout = os.path.join(workdir, f'galaxy_ng.{cfg.branch}')
-        ts = datetime.datetime.now().isoformat().split('.')[0].replace('-', '_').replace(':', '_')
+        ts = datetime.datetime.now().strftime("%Y_%m_%dT%H_%M_%S")  # noqa: DTZ005
         new_branch = f'BUMP_DEPS_{ts}_{cfg.branch}'.replace('-', '_').replace('.', '_')
         construct_checkout(branch_checkout, base_branch=cfg.branch, new_branch=new_branch)
 
         # assemble the container internal script
-        commands = []
-        commands.append(f'source /venv-{cfg.python}/bin/activate')
-        commands.append(f'/venv-{cfg.python}/bin/pip install --upgrade pip=={cfg.pip}')
-        commands.append(f'/venv-{cfg.python}/bin/pip install pip-tools=={cfg.pip_tools}')
+        commands = [
+            f'source /venv-{cfg.python}/bin/activate',
+            f'/venv-{cfg.python}/bin/pip install --upgrade pip=={cfg.pip}',
+            f'/venv-{cfg.python}/bin/pip install pip-tools=={cfg.pip_tools}',
+        ]
 
         # be smarter than the makefile
         for RF in REQUIREMENTS_FILES:
diff --git a/galaxy_ng/app/api/v1/tasks.py b/galaxy_ng/app/api/v1/tasks.py
index 0fc9ecf485..bcad9cc205 100644
--- a/galaxy_ng/app/api/v1/tasks.py
+++ b/galaxy_ng/app/api/v1/tasks.py
@@ -238,7 +238,7 @@ def compute_all_versions(this_role, gitrepo):
         if str(tag.name) in current_tags:
             continue
 
-        ts = datetime.datetime.now().isoformat()
+        ts = datetime.datetime.now().isoformat()  # noqa: DTZ005
         vdata = {
             'id': str(uuid.uuid4()),
             'tag': tag.name,
@@ -497,7 +497,7 @@ def legacy_role_import(
 
         galaxy_info = result["metadata"]["galaxy_info"]
         new_full_metadata = {
-            'imported': datetime.datetime.now().isoformat(),
+            'imported': datetime.datetime.now().isoformat(),  # noqa: DTZ005
             'clone_url': clone_url,
             'tags': galaxy_info.get("galaxy_tags", []),
             'github_user': real_github_user,
@@ -642,9 +642,9 @@ def legacy_sync_from_upstream(
         role_dependencies = sfields.get('dependencies', [])
         role_min_ansible = rdata.get('min_ansible_version')
         role_company = rdata.get('company')
-        role_imported = rdata.get('imported', datetime.datetime.now().isoformat())
-        role_created = rdata.get('created', datetime.datetime.now().isoformat())
-        role_modified = rdata.get('modified', datetime.datetime.now().isoformat())
+        role_imported = rdata.get('imported', datetime.datetime.now().isoformat())  # noqa: DTZ005
+        role_created = rdata.get('created', datetime.datetime.now().isoformat())  # noqa: DTZ005
+        role_modified = rdata.get('modified', datetime.datetime.now().isoformat())  # noqa: DTZ005
         role_type = rdata.get('role_type', 'ANS')
         role_download_count = rdata.get('download_count', 0)
 
diff --git a/galaxy_ng/app/management/commands/sync-collection-download-counts.py b/galaxy_ng/app/management/commands/sync-collection-download-counts.py
index 521dcafada..d7e6a83179 100644
--- a/galaxy_ng/app/management/commands/sync-collection-download-counts.py
+++ b/galaxy_ng/app/management/commands/sync-collection-download-counts.py
@@ -39,7 +39,7 @@ def handle(self, *args, **options):
         upstream = options['upstream']
         limit = options['limit']
 
-        now = datetime.datetime.now()
+        now = datetime.datetime.now()  # noqa: DTZ005
 
         collection_count = 0
         collection_total = Collection.objects.count()
diff --git a/galaxy_ng/tests/integration/api/test_remote_sync.py b/galaxy_ng/tests/integration/api/test_remote_sync.py
index c81fd5dfb1..828678632b 100644
--- a/galaxy_ng/tests/integration/api/test_remote_sync.py
+++ b/galaxy_ng/tests/integration/api/test_remote_sync.py
@@ -30,8 +30,8 @@ def test_api_ui_v1_remote_sync(galaxy_client):
         'token': None,
         'policy': 'immediate',
         'requirements_file': REQUIREMENTS_FILE,
-        'created_at': str(datetime.now()),
-        'updated_at': str(datetime.now()),
+        'created_at': str(datetime.now()),  # noqa: DTZ005
+        'updated_at': str(datetime.now()),  # noqa: DTZ005
         'username': None,
         'password': None,
         'tls_validation': False,
diff --git a/pyproject.toml b/pyproject.toml
index 051aa96e83..6c13401d34 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,6 +113,8 @@ select = [
     "C4",
     # flake8-commas
     "COM",
+    # flake8-datetime
+    "DTZ",
     # flake8-no-pep420
     "INP",
     # flake8-gettext