diff --git a/releasenotes/notes/python-39-deprecation-4098f0a0ef201ad2.yaml b/releasenotes/notes/python-39-deprecation-4098f0a0ef201ad2.yaml
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+++ b/releasenotes/notes/python-39-deprecation-4098f0a0ef201ad2.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Python 3.9 has been deprecated as it reached EOL 2025-10-31. While the code
+    may work on this version, there will be no CI tests running on it.