Index: src/wp-includes/class-wp-customize-manager.php
===================================================================
--- src/wp-includes/class-wp-customize-manager.php	(revision 42104)
+++ src/wp-includes/class-wp-customize-manager.php	(working copy)
@@ -4569,7 +4569,7 @@
 			$changeset_post = get_post( $changeset_post_id );
 		}
 
-		if ( $this->changeset_post_id() && 'future' === get_post_status( $this->changeset_post_id() ) ) {
+		if ( $this->changeset_post_id() && ( time() < get_post_time( 'U', true, $this->changeset_post_id() ) ) ) {
 			$initial_date = get_the_time( 'Y-m-d H:i:s', $this->changeset_post_id() );
 		} else {
 			$initial_date = current_time( 'mysql', false );