diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index b1828c3fde..ada21ec8dd 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -2212,8 +2212,13 @@ function wp_new_comment( $commentdata ) {
 	$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '',$_SERVER['REMOTE_ADDR'] );
 	$commentdata['comment_agent']     = isset( $_SERVER['HTTP_USER_AGENT'] ) ? substr( $_SERVER['HTTP_USER_AGENT'], 0, 254 ) : '';
 
-	$commentdata['comment_date']     = current_time('mysql');
-	$commentdata['comment_date_gmt'] = current_time('mysql', 1);
+	if ( empty( $commentdata['comment_date'] ) ) {
+		$commentdata['comment_date'] = current_time('mysql');
+	}
+
+	if ( empty( $commentdata['comment_date_gmt'] ) ) {
+		$commentdata['comment_date_gmt'] = current_time( 'mysql', 1 );
+	}
 
 	$commentdata = wp_filter_comment($commentdata);
 
diff --git a/tests/phpunit/tests/comment.php b/tests/phpunit/tests/comment.php
index 0bd3920b5a..ff3cc1fc2d 100644
--- a/tests/phpunit/tests/comment.php
+++ b/tests/phpunit/tests/comment.php
@@ -72,4 +72,44 @@ class Tests_Comment extends WP_UnitTestCase {
 
 		$this->assertSame( array(), $found );
 	}
+
+	/**
+	 * @ticket 14279
+	 */
+	public function test_wp_new_comment_respects_dates() {
+		// `wp_new_comment()` checks REMOTE_ADDR, so we fake it to avoid PHP notices.
+		if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
+			$remote_addr = $_SERVER['REMOTE_ADDR'];
+		} else {
+			$_SERVER['REMOTE_ADDR'] = '';
+		}
+
+		$u = $this->factory->user->create();
+		$post_id = $this->factory->post->create( array( 'post_author' => $u ) );
+
+		$data = array(
+			'comment_post_ID' => $post_id,
+			'comment_author' => rand_str(),
+			'comment_author_url' => '',
+			'comment_author_email' => '',
+			'comment_type' => '',
+			'comment_content' => rand_str(),
+			'comment_date' => '2011-01-01 10:00:00',
+			'comment_date_gmt' => '2011-01-01 10:00:00',
+		);
+
+		$id = wp_new_comment( $data );
+
+		$comment = get_comment( $id );
+
+		$this->assertEquals( $data['comment_date'], $comment->comment_date );
+		$this->assertEquals( $data['comment_date_gmt'], $comment->comment_date_gmt );
+
+		// Cleanup.
+		if ( isset( $remote_addr ) ) {
+			$_SERVER['REMOTE_ADDR'] = $remote_addr;
+		} else {
+			unset( $_SERVER['REMOTE_ADDR'] );
+		}
+	}
 }