diff --git a/readme.html b/readme.html
index 82da6a0e04..32ba94d648 100644
--- a/readme.html
+++ b/readme.html
@@ -75,7 +75,7 @@
 		<dd>The WordPress Planet is a news aggregator that brings together posts from WordPress blogs around the web.</dd>
 	<dt><a href="https://wordpress.org/support/forums/">WordPress Support Forums</a></dt>
 		<dd>If you&#8217;ve looked everywhere and still can&#8217;t find an answer, the support forums are very active and have a large community ready to help. To help them help you be sure to use a descriptive thread title and describe your question in as much detail as possible.</dd>
-	<dt><a href="https://codex.wordpress.org/IRC">WordPress <abbr>IRC</abbr> (Internet Relay Chat) Channel</a></dt>
+	<dt><a href="https://make.wordpress.org/support/handbook/appendix/other-support-locations/introduction-to-irc/">WordPress <abbr>IRC</abbr> (Internet Relay Chat) Channel</a></dt>
 		<dd>There is an online chat channel that is used for discussion among people who use WordPress and occasionally support topics. The above wiki page should point you in the right direction. (<a href="irc://irc.freenode.net/wordpress">irc.freenode.net #wordpress</a>)</dd>
 </dl>
 
diff --git a/wp-admin/network/settings.php b/wp-admin/network/settings.php
index ffee085814..a96c336735 100644
--- a/wp-admin/network/settings.php
+++ b/wp-admin/network/settings.php
@@ -60,7 +60,7 @@ get_current_screen()->add_help_tab(
 
 get_current_screen()->set_help_sidebar(
 	'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
-	'<p>' . __( '<a href="https://codex.wordpress.org/Network_Admin_Settings_Screen">Documentation on Network Settings</a>' ) . '</p>' .
+	'<p>' . __( '<a href="https://wordpress.org/support/article/network-admin-settings-screen/">Documentation on Network Settings</a>' ) . '</p>' .
 	'<p>' . __( '<a href="https://wordpress.org/support/">Support</a>' ) . '</p>'
 );
 
diff --git a/wp-admin/options-writing.php b/wp-admin/options-writing.php
index 8134c2fb83..5944124bce 100644
--- a/wp-admin/options-writing.php
+++ b/wp-admin/options-writing.php
@@ -205,9 +205,9 @@ if ( apply_filters( 'enable_update_services_configuration', true ) ) {
 	<p><label for="ping_sites">
 		<?php
 		printf(
-			/* translators: %s: Codex URL. */
+			/* translators: %s: Documentation URL. */
 			__( 'When you publish a new post, WordPress automatically notifies the following site update services. For more about this, see <a href="%s">Update Services</a> on the Codex. Separate multiple service URLs with line breaks.' ),
-			__( 'https://codex.wordpress.org/Update_Services' )
+			__( 'https://wordpress.org/support/article/update-services/' )
 		);
 		?>
 	</label></p>
@@ -219,9 +219,9 @@ if ( apply_filters( 'enable_update_services_configuration', true ) ) {
 	<p>
 		<?php
 		printf(
-			/* translators: 1: Codex URL, 2: URL to Reading Settings screen. */
+			/* translators: 1: Documentation URL, 2: URL to Reading Settings screen. */
 			__( 'WordPress is not notifying any <a href="%1$s">Update Services</a> because of your site&#8217;s <a href="%2$s">visibility settings</a>.' ),
-			__( 'https://codex.wordpress.org/Update_Services' ),
+			__( 'https://wordpress.org/support/article/update-services/' ),
 			'options-reading.php'
 		);
 		?>
diff --git a/wp-includes/query.php b/wp-includes/query.php
index a67c2e1516..8668f62a8a 100644
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -901,12 +901,12 @@ function is_embed() {
 function is_main_query() {
 	if ( 'pre_get_posts' === current_filter() ) {
 		$message = sprintf(
-			/* translators: 1: pre_get_posts, 2: WP_Query->is_main_query(), 3: is_main_query(), 4: Link to codex is_main_query() page. */
+			/* translators: 1: pre_get_posts, 2: WP_Query->is_main_query(), 3: is_main_query(), 4: Documentation URL. */
 			__( 'In %1$s, use the %2$s method, not the %3$s function. See %4$s.' ),
 			'<code>pre_get_posts</code>',
 			'<code>WP_Query->is_main_query()</code>',
 			'<code>is_main_query()</code>',
-			__( 'https://codex.wordpress.org/Function_Reference/is_main_query' )
+			__( 'https://developer.wordpress.org/reference/functions/is_main_query/' )
 		);
 		_doing_it_wrong( __FUNCTION__, $message, '3.7.0' );
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e2c262cbde..d2b5e0ae64 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49911';
+$wp_version = '5.7-alpha-49912';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 5eabf8a540..37984547ad 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -1887,11 +1887,11 @@ class wpdb {
 	/**
 	 * Performs a MySQL database query, using current database connection.
 	 *
-	 * More information can be found on the Codex page.
+	 * More information can be found on the documentation page.
 	 *
 	 * @since 0.71
 	 *
-	 * @link https://codex.wordpress.org/Function_Reference/wpdb_Class
+	 * @link https://developer.wordpress.org/reference/classes/wpdb/
 	 *
 	 * @param string $query Database query.
 	 * @return int|bool Boolean true for CREATE, ALTER, TRUNCATE and DROP queries. Number of rows