diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 7636c3d02b..306e567bb9 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -3663,14 +3663,13 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	if ( 'attachment' !== $post_type ) {
-		if ( 'publish' == $post_status ) {
-			$now = gmdate( 'Y-m-d H:i:59' );
-			if ( mysql2date( 'U', $post_date_gmt, false ) > mysql2date( 'U', $now, false ) ) {
+		if ( 'publish' === $post_status ) {
+			// String comparison to work around far future dates (year 2038+) on 32-bit systems.
+			if ( $post_date_gmt > gmdate( 'Y-m-d H:i:59' ) ) {
 				$post_status = 'future';
 			}
-		} elseif ( 'future' == $post_status ) {
-			$now = gmdate( 'Y-m-d H:i:59' );
-			if ( mysql2date( 'U', $post_date_gmt, false ) <= mysql2date( 'U', $now, false ) ) {
+		} elseif ( 'future' === $post_status ) {
+			if ( $post_date_gmt <= gmdate( 'Y-m-d H:i:59' ) ) {
 				$post_status = 'publish';
 			}
 		}
diff --git a/tests/phpunit/tests/post/wpInsertPost.php b/tests/phpunit/tests/post/wpInsertPost.php
index 519248a567..b52ba74c03 100644
--- a/tests/phpunit/tests/post/wpInsertPost.php
+++ b/tests/phpunit/tests/post/wpInsertPost.php
@@ -302,4 +302,25 @@ class Tests_WPInsertPost extends WP_UnitTestCase {
 		$this->assertSame( $expected, $actual );
 	}
 
+	/**
+	 * @ticket 25347
+	 */
+	function test_scheduled_post_with_a_past_date_should_be_published() {
+
+		$now = new DateTimeImmutable( 'now', new DateTimeZone( 'UTC' ) );
+
+		$post_id = $this->factory()->post->create( [
+			'post_date_gmt' => $now->modify( '-1 year' )->format( 'Y-m-d H:i:s' ),
+			'post_status'   => 'future',
+		] );
+
+		$this->assertEquals( 'publish', get_post_status( $post_id ) );
+
+		$post_id = $this->factory()->post->create( [
+			'post_date_gmt' => $now->modify( '+50 years' )->format( 'Y-m-d H:i:s' ),
+			'post_status'   => 'future',
+		] );
+
+		$this->assertEquals( 'future', get_post_status( $post_id ) );
+	}
 }