diff --git a/doc/architecture/blueprints/gitlab_observability_backend/metrics/index.md b/doc/architecture/blueprints/gitlab_observability_backend/metrics/index.md
index 8485a36f7b0ec5092f741945c31c7d381d07ae72..a6efe68310e516c9d30e002e79da70a80aaae36f 100644
--- a/doc/architecture/blueprints/gitlab_observability_backend/metrics/index.md
+++ b/doc/architecture/blueprints/gitlab_observability_backend/metrics/index.md
@@ -1,6 +1,6 @@
 ---
 status: proposed
-creation-date: 2022-11-09
+creation-date: "2022-11-09"
 authors: [ "@ankitbhatnagar" ]
 coach: "@mappelman"
 approvers: [ "@sebastienpahl", "@nicholasklick" ]