diff -r 3d4e9c994f10 -r a86126ab1dd4 wp/wp-includes/IXR/class-IXR-date.php
--- a/wp/wp-includes/IXR/class-IXR-date.php	Tue Oct 22 16:11:46 2019 +0200
+++ b/wp/wp-includes/IXR/class-IXR-date.php	Tue Dec 15 13:49:49 2020 +0100
@@ -37,12 +37,12 @@
 
     function parseTimestamp($timestamp)
     {
-        $this->year = date('Y', $timestamp);
-        $this->month = date('m', $timestamp);
-        $this->day = date('d', $timestamp);
-        $this->hour = date('H', $timestamp);
-        $this->minute = date('i', $timestamp);
-        $this->second = date('s', $timestamp);
+        $this->year = gmdate('Y', $timestamp);
+        $this->month = gmdate('m', $timestamp);
+        $this->day = gmdate('d', $timestamp);
+        $this->hour = gmdate('H', $timestamp);
+        $this->minute = gmdate('i', $timestamp);
+        $this->second = gmdate('s', $timestamp);
         $this->timezone = '';
     }