diff --git a/libcxx/docs/ReleaseNotes.rst b/libcxx/docs/ReleaseNotes.rst
--- a/libcxx/docs/ReleaseNotes.rst
+++ b/libcxx/docs/ReleaseNotes.rst
@@ -1,6 +1,6 @@
-=========================================
-Libc++ 14.0.0 (In-Progress) Release Notes
-=========================================
+==================================================
+Libc++ |version| |ReleaseNotesTitle|
+==================================================
 
 .. contents::
    :local:
@@ -8,17 +8,18 @@
 
 Written by the `Libc++ Team <https://libcxx.llvm.org>`_
 
-.. warning::
+.. only:: PreRelease
 
-   These are in-progress notes for the upcoming libc++ 14 release.
-   Release notes for previous releases can be found on
-   `the Download Page <https://releases.llvm.org/download.html>`_.
+  .. warning::
+     These are in-progress notes for the upcoming libc++ |version| release.
+     Release notes for previous releases can be found on
+     `the Download Page <https://releases.llvm.org/download.html>`_.
 
 Introduction
 ============
 
 This document contains the release notes for the libc++ C++ Standard Library,
-part of the LLVM Compiler Infrastructure, release 14.0.0. Here we describe the
+part of the LLVM Compiler Infrastructure, release |version|. Here we describe the
 status of libc++ in some detail, including major improvements from the previous
 release and new feature work. For the general LLVM release notes, see `the LLVM
 documentation <https://llvm.org/docs/ReleaseNotes.html>`_. All LLVM releases may
@@ -32,8 +33,8 @@
 the current one. To see the release notes for a specific release, please
 see the `releases page <https://llvm.org/releases/>`_.
 
-What's New in Libc++ 14.0.0?
-============================
+What's New in Libc++ |version|?
+===============================
 
 New Features
 ------------
diff --git a/libcxx/docs/conf.py b/libcxx/docs/conf.py
--- a/libcxx/docs/conf.py
+++ b/libcxx/docs/conf.py
@@ -47,10 +47,15 @@
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-# The short X.Y version.
-version = '14.0'
+# The major version.
+version = '14'
+
+# True if this is a pre_release.  This should be True in the main
+# branch and False in the release branches.
+pre_release = True
+
 # The full version, including alpha/beta/rc tags.
-release = '14.0'
+release = version + '.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -87,6 +92,15 @@
 #modindex_common_prefix = []
 
 
+if pre_release:
+  tags.add('PreRelease')
+
+in_progress_title = "(In-Progress) " if pre_release else ""
+
+rst_epilog = f"""
+.. |ReleaseNotesTitle| replace:: {in_progress_title} Release Notes
+"""
+
 # -- Options for HTML output ---------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for