diff --git a/administrator/language/en-GB/en-GB.xml b/administrator/language/en-GB/en-GB.xml
index 7affa5c6947..972a46a5fdb 100644
--- a/administrator/language/en-GB/en-GB.xml
+++ b/administrator/language/en-GB/en-GB.xml
@@ -2,7 +2,7 @@
 <metafile version="3.9" client="administrator">
 	<name>English (en-GB)</name>
 	<version>3.10.4</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<authorEmail>admin@joomla.org</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
diff --git a/administrator/language/en-GB/install.xml b/administrator/language/en-GB/install.xml
index 59c8c06ba5e..e08ca13ef84 100644
--- a/administrator/language/en-GB/install.xml
+++ b/administrator/language/en-GB/install.xml
@@ -3,7 +3,7 @@
 	<name>English (en-GB)</name>
 	<tag>en-GB</tag>
 	<version>3.10.4</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<authorEmail>admin@joomla.org</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
diff --git a/administrator/manifests/files/joomla.xml b/administrator/manifests/files/joomla.xml
index b7e24a45e47..e03154c5bf6 100644
--- a/administrator/manifests/files/joomla.xml
+++ b/administrator/manifests/files/joomla.xml
@@ -6,8 +6,8 @@
 	<authorUrl>www.joomla.org</authorUrl>
 	<copyright>(C) 2019 Open Source Matters, Inc.</copyright>
 	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
-	<version>3.10.4-dev</version>
-	<creationDate>October 2021</creationDate>
+	<version>3.10.4-rc1</version>
+	<creationDate>November 2021</creationDate>
 	<description>FILES_JOOMLA_XML_DESCRIPTION</description>
 
 	<scriptfile>administrator/components/com_admin/script.php</scriptfile>
diff --git a/administrator/manifests/packages/pkg_en-GB.xml b/administrator/manifests/packages/pkg_en-GB.xml
index 1d8445e5b68..1f1d9780a8c 100644
--- a/administrator/manifests/packages/pkg_en-GB.xml
+++ b/administrator/manifests/packages/pkg_en-GB.xml
@@ -3,7 +3,7 @@
 	<name>English (en-GB) Language Pack</name>
 	<packagename>en-GB</packagename>
 	<version>3.10.4.1</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<authorEmail>admin@joomla.org</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
diff --git a/installation/language/en-GB/en-GB.xml b/installation/language/en-GB/en-GB.xml
index 0ed664153f2..43fd3f1fafd 100644
--- a/installation/language/en-GB/en-GB.xml
+++ b/installation/language/en-GB/en-GB.xml
@@ -4,7 +4,7 @@
 	client="installation">
 	<name>English (United Kingdom)</name>
 	<version>3.10.4</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<copyright>(C) 2005 Open Source Matters, Inc.</copyright>
 	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
diff --git a/language/en-GB/en-GB.xml b/language/en-GB/en-GB.xml
index fc342c911fd..89017c08cb1 100644
--- a/language/en-GB/en-GB.xml
+++ b/language/en-GB/en-GB.xml
@@ -2,7 +2,7 @@
 <metafile version="3.9" client="site">
 	<name>English (en-GB)</name>
 	<version>3.10.4</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<authorEmail>admin@joomla.org</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
diff --git a/language/en-GB/install.xml b/language/en-GB/install.xml
index b18bfed8753..2a7b546964b 100644
--- a/language/en-GB/install.xml
+++ b/language/en-GB/install.xml
@@ -3,7 +3,7 @@
 	<name>English (en-GB)</name>
 	<tag>en-GB</tag>
 	<version>3.10.4</version>
-	<creationDate>October 2021</creationDate>
+	<creationDate>November 2021</creationDate>
 	<author>Joomla! Project</author>
 	<authorEmail>admin@joomla.org</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
diff --git a/libraries/src/Version.php b/libraries/src/Version.php
index d95ae2404c0..68a9a56a6d8 100644
--- a/libraries/src/Version.php
+++ b/libraries/src/Version.php
@@ -60,7 +60,7 @@ final class Version
 	 * @var    string
 	 * @since  3.8.0
 	 */
-	const EXTRA_VERSION = 'dev';
+	const EXTRA_VERSION = 'rc1';
 
 	/**
 	 * Release version.
@@ -78,7 +78,7 @@ final class Version
 	 * @since  3.5
 	 * @deprecated  4.0  Use separated version constants instead
 	 */
-	const DEV_LEVEL = '4-dev';
+	const DEV_LEVEL = '4-rc1';
 
 	/**
 	 * Development status.
@@ -86,7 +86,7 @@ final class Version
 	 * @var    string
 	 * @since  3.5
 	 */
-	const DEV_STATUS = 'Development';
+	const DEV_STATUS = 'Release Candidate';
 
 	/**
 	 * Build number.
@@ -111,7 +111,7 @@ final class Version
 	 * @var    string
 	 * @since  3.5
 	 */
-	const RELDATE = '27-November-2021';
+	const RELDATE = '28-November-2021';
 
 	/**
 	 * Release time.
@@ -119,7 +119,7 @@ final class Version
 	 * @var    string
 	 * @since  3.5
 	 */
-	const RELTIME = '13:20';
+	const RELTIME = '18:30';
 
 	/**
 	 * Release timezone.