diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index b55620db73..05489359da 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -1393,7 +1393,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			// #38883).  In this case, shim the value based on the `post_date`
 			// field with the site's timezone offset applied.
 			if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
-				$post_date_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_date ) - ( get_option( 'gmt_offset' ) * 3600 ) );
+				$post_date_gmt = get_gmt_from_date( $post->post_date );
 			} else {
 				$post_date_gmt = $post->post_date_gmt;
 			}