diff --git a/ansible/inventory/group_vars/all.yml b/ansible/inventory/group_vars/all.yml
index 086f863..538b972 100644
--- a/ansible/inventory/group_vars/all.yml
+++ b/ansible/inventory/group_vars/all.yml
@@ -25,6 +25,9 @@ docker_users:
 # Application deployment
 app_root: /opt/ttlsh
 
+# UTC window during which Zot may start its daily garbage-collection sweep.
+zot_gc_time_window: "00:00-03:00"
+
 # S3-compatible object storage backing the zot registry
 s3_bucket: "_in_doppler"
 s3_region: "_in_doppler"
diff --git a/ansible/templates/zot-config.json.j2 b/ansible/templates/zot-config.json.j2
index 7774804..c93415e 100644
--- a/ansible/templates/zot-config.json.j2
+++ b/ansible/templates/zot-config.json.j2
@@ -5,6 +5,7 @@
     "redirectBlobURL": true,
     "dedupe": false,
     "gc": true,
+    "gcTimeWindow": "{{ zot_gc_time_window }}",
     "storageDriver": {
       "name": "s3",
       "rootdirectory": "{{ s3_root_directory }}",