8327486: java/util/Properties/PropertiesStoreTest.java fails "Text 'x…

…xx' could not be parsed at index 20" after 8174269

Backport-of: e21da4caacb464827270d20b8fc62a50a1706316

test/jdk/java/util/Properties/PropertiesStoreTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -55,9 +55,9 @@
 public class PropertiesStoreTest {
 
     private static final String DATE_FORMAT_PATTERN = "EEE MMM dd HH:mm:ss zzz uuuu";
-    // use a neutral locale, since when the date comment was written by Properties.store(...),
-    // it internally calls the Date.toString() which always writes in a locale insensitive manner
-    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern(DATE_FORMAT_PATTERN, Locale.ROOT);
+    // use Locale.US, since when the date comment was written by Properties.store(...),
+    // it internally calls the Date.toString() which uses Locale.US for time zone names
+    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern(DATE_FORMAT_PATTERN, Locale.US);
     private static final Locale PREV_LOCALE = Locale.getDefault();
 
     @DataProvider(name = "propsProvider")