diff --git a/scripts/update_dates.sh b/scripts/update_dates.sh
new file mode 100644
index 0000000..db878f3
--- /dev/null
+++ b/scripts/update_dates.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+#
+# Copyright (C) 2025 Moko Consulting <hello@mokoconsulting.tech>
+#
+# This file is part of a Moko Consulting project.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# FILE INFORMATION
+# DEFGROUP: Release.Automation
+# INGROUP: Date.Normalization
+# REPO: https://github.com/mokoconsulting-tech/MokoStandards
+# PATH: /scripts/update_dates.sh
+# VERSION: 01.00.00
+# BRIEF: Normalize release dates across manifests and CHANGELOG using a single authoritative UTC date.
+# NOTE: Repo-controlled script only. No fallback logic. CI-fatal on malformed inputs.
+
+set -euo pipefail
+
+TODAY_UTC="${1:-}"
+VERSION="${2:-}"
+
+if [ -z "${TODAY_UTC}" ] || [ -z "${VERSION}" ]; then
+	echo "ERROR: Usage: update_dates.sh <YYYY-MM-DD> <VERSION>" >&2
+	exit 1
+fi
+
+# Validate date format strictly
+if ! echo "${TODAY_UTC}" | grep -Eq '^[0-9]{4}-[0-9]{2}-[0-9]{2}$'; then
+	echo "ERROR: Invalid date format. Expected YYYY-MM-DD, got '${TODAY_UTC}'" >&2
+	exit 1
+fi
+
+# Validate version format strictly
+if ! echo "${VERSION}" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$'; then
+	echo "ERROR: Invalid version format. Expected X.Y.Z, got '${VERSION}'" >&2
+	exit 1
+fi
+
+echo "Normalizing dates to ${TODAY_UTC} for version ${VERSION}"
+
+# Update CHANGELOG.md heading date
+if [ -f CHANGELOG.md ]; then
+	if grep -Eq "^## \\[${VERSION}\\]" CHANGELOG.md; then
+		sed -i -E "s#^(## \\[${VERSION}\\]) .*#\\1 ${TODAY_UTC}#" CHANGELOG.md
+	else
+		echo "ERROR: CHANGELOG.md does not contain heading for version [${VERSION}]" >&2
+		exit 1
+	fi
+else
+	echo "ERROR: CHANGELOG.md not found" >&2
+	exit 1
+fi
+
+# Update XML manifest dates
+find . -type f -name "*.xml" \
+	-not -path "./.git/*" \
+	-not -path "./.github/*" \
+	-print0 | while IFS= read -r -d '' FILE; do
+		sed -i "s#<creationDate>[^<]*</creationDate>#<creationDate>${TODAY_UTC}</creationDate>#g" "${FILE}" || true
+		sed -i "s#<date>[^<]*</date>#<date>${TODAY_UTC}</date>#g" "${FILE}" || true
+		sed -i "s#<buildDate>[^<]*</buildDate>#<buildDate>${TODAY_UTC}</buildDate>#g" "${FILE}" || true
+	done
+
+echo "Date normalization complete."