--- old/src/share/vm/runtime/os.cpp	2018-01-24 01:41:52.913974843 -0800
+++ new/src/share/vm/runtime/os.cpp	2018-01-24 01:41:52.827967015 -0800
@@ -847,7 +847,7 @@
   pd_print_cpu_info(st);
 }
 
-void os::print_date_and_time(outputStream *st) {
+void os::print_date_and_time(outputStream *st, char* buf, size_t buflen) {
   const int secs_per_day  = 86400;
   const int secs_per_hour = 3600;
   const int secs_per_min  = 60;
@@ -856,6 +856,12 @@
   (void)time(&tloc);
   st->print("time: %s", ctime(&tloc));  // ctime adds newline.
 
+  struct tm tz;
+  if (localtime_pd(&tloc, &tz) != NULL) {
+    ::strftime(buf, buflen, "%Z", &tz);
+    st->print_cr("timezone: %s", buf);
+  }
+
   double t = os::elapsedTime();
   // NOTE: It tends to crash after a SEGV if we want to printf("%f",...) in
   //       Linux. Must be a bug in glibc ? Workaround is to round "t" to int