diff --git a/docs/ldml/tr35-dates.md b/docs/ldml/tr35-dates.md
index ec2883673f3..3c188fc61f4 100644
--- a/docs/ldml/tr35-dates.md
+++ b/docs/ldml/tr35-dates.md
@@ -2375,6 +2375,9 @@ This section describes only the structures and enumerations for expressing a sem
 
 Note: This document does not currently define a string form, but we may need one for MessageFormat.
 
+> [!IMPORTANT]
+> This section is a technical preview and should not be considered stable.
+
 ### <a name="Parts_of_a_Semantic_Skeleton" href="#Parts_of_a_Semantic_Skeleton">Parts of a Semantic Skeleton</a>
 
 A semantic skeleton is composed of two parts: