diff -r 40c07de877ab src/hotspot/share/runtime/os.cpp
--- a/src/hotspot/share/runtime/os.cpp	Mon Jul 27 10:56:51 2020 +0200
+++ b/src/hotspot/share/runtime/os.cpp	Wed Jul 29 16:16:20 2020 +0200
@@ -90,7 +90,7 @@
 
 static time_t get_timezone(const struct tm* time_struct) {
 #if defined(_ALLBSD_SOURCE)
-  return time_struct->tm_gmtoff;
+  return -(time_struct->tm_gmtoff);
 #elif defined(_WINDOWS)
   long zone;
   _get_timezone(&zone);