Automatic code cleanup.

PiperOrigin-RevId: 179042182
diff --git a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
index 5c2a5c1..ee72a4c 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
@@ -27,6 +27,7 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintStream;
+import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.EnumSet;
@@ -359,6 +360,6 @@
    * @return a string representing the current time, eg "04-26 13:47:32.124".
    */
   protected String timestamp() {
-    return TIMESTAMP_FORMAT.format(ZonedDateTime.now());
+    return TIMESTAMP_FORMAT.format(ZonedDateTime.now(ZoneId.systemDefault()));
   }
 }