diff --git a/RELEASE-NOTES-1.38 b/RELEASE-NOTES-1.38
index 62c8c739d73..477b4a6e1d2 100644
--- a/RELEASE-NOTES-1.38
+++ b/RELEASE-NOTES-1.38
@@ -40,6 +40,7 @@ For notes on 1.36.x and older releases, see HISTORY.
   of C.UTF-8 or C and works around the remaining problems of the C locale by
   not using escapeshellarg. This follows the direction of PHP 8.0, which sets
   a locale of C by default instead of respecting LC_CTYPE.
+* $wgLoggedOutMaxAge - Experiment removed, originally added in 1.35. (T293848)
 * $wgIncludejQueryMigrate - Deprecated in 1.36. We only support jQuery v3.
 * …
 
diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index 0189be255eb..85333c9b338 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -3276,15 +3276,6 @@ $wgCdnMaxageLagged = 30;
  */
 $wgCdnMaxageStale = 10;
 
-/**
- * Cache TTL for the user agent sent as max-age, for logged out users.
- * Only applies if $wgUseCdn is false.
- * @see $wgUseCdn
- *
- * @since 1.35
- */
-$wgLoggedOutMaxAge = 0;
-
 /**
  * If set, any SquidPurge call on a URL or URLs will send a second purge no less than
  * this many seconds later via the job queue. This requires delayed job support.
diff --git a/includes/OutputPage.php b/includes/OutputPage.php
index f15a289d577..e61833cabff 100644
--- a/includes/OutputPage.php
+++ b/includes/OutputPage.php
@@ -2506,20 +2506,11 @@ class OutputPage extends ContextSource {
 					"s-maxage={$this->mCdnMaxage}, must-revalidate, max-age=0" );
 			} else {
 				# We do want clients to cache if they can, but they *must* check for updates
-				# on revisiting the page, after the max-age period.
+				# on revisiting the page.
 				wfDebug( __METHOD__ . ": private caching ($privateReason); {$this->mLastModified} **", 'private' );
 
-				if ( $response->hasCookies() || SessionManager::getGlobalSession()->isPersistent() ) {
-					$response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
-					$response->header( "Cache-Control: private, must-revalidate, max-age=0" );
-				} else {
-					$response->header(
-						'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + $config->get( 'LoggedOutMaxAge' ) ) . ' GMT'
-					);
-					$response->header(
-						"Cache-Control: private, must-revalidate, max-age={$config->get( 'LoggedOutMaxAge' )}"
-					);
-				}
+				$response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
+				$response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 			}
 			if ( $this->mLastModified ) {
 				$response->header( "Last-Modified: {$this->mLastModified}" );
diff --git a/tests/phpunit/includes/OutputPageTest.php b/tests/phpunit/includes/OutputPageTest.php
index 6158ed89a0c..65d98eecc68 100644
--- a/tests/phpunit/includes/OutputPageTest.php
+++ b/tests/phpunit/includes/OutputPageTest.php
@@ -3040,7 +3040,6 @@ class OutputPageTest extends MediaWikiIntegrationTestCase {
 	 */
 	public function testSendCacheControl( array $options = [], array $expectations = [] ) {
 		$output = $this->newInstance( [
-			'LoggedOutMaxAge' => $options['loggedOutMaxAge'] ?? 0,
 			'UseCdn' => $options['useCdn'] ?? false,
 		] );
 
@@ -3083,10 +3082,7 @@ class OutputPageTest extends MediaWikiIntegrationTestCase {
 			'Default' => [],
 			'Logged out max-age' => [
 				[
-					'loggedOutMaxAge' => 300,
-				],
-				[
-					'Cache-Control' => 'private, must-revalidate, max-age=300',
+					'Cache-Control' => 'private, must-revalidate, max-age=0',
 				],
 			],
 			'Cookies' => [
@@ -3094,12 +3090,6 @@ class OutputPageTest extends MediaWikiIntegrationTestCase {
 					'cookie' => true,
 				],
 			],
-			'Cookies with logged out max-age' => [
-				[
-					'loggedOutMaxAge' => 300,
-					'cookie' => true,
-				],
-			],
 			'Disable client cache' => [
 				[
 					'enableClientCache' => false,