diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96e3302..678f5e1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.3.0] - Unreleased
+## [0.3.0] - 2026-09-28
 
 A breaking release: the pipeline's entry points, the default data locations and
 the artifact layout all move. Read **Changed** before upgrading. This release is
-verified on Linux x86-64; the macOS and Windows base-wheel CI lanes are defined
-but have not yet run.
+verified on Linux x86-64. On macOS and Windows, CI checks only that the base
+wheel builds, installs and imports; builds, sidecars and native readers are
+untested there.
 
 ### Added
 
diff --git a/CITATION.cff b/CITATION.cff
index 24b5aa9..2dad3fe 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -8,7 +8,7 @@ abstract: >-
   and consistent re-derivation of dataset artefacts across users and machines.
 type: software
 version: 0.3.0
-# date-released: set to the tag date when the release is cut, matching CHANGELOG.md.
+date-released: 2026-09-28
 url: "https://github.com/spiraldb/raincloud"
 repository-code: "https://github.com/spiraldb/raincloud"
 license: Apache-2.0