--- /dev/null	2019-07-22 15:26:12.000000000 -0700
+++ new/test/jdk/java/util/TimeZone/NegativeDSTTest.java	2019-07-22 15:26:12.000000000 -0700
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2019, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import static org.testng.Assert.assertEquals;
+
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.ZonedDateTime;
+import java.time.ZoneId;
+import java.util.Date;
+import java.util.TimeZone;
+
+import org.testng.annotations.Test;
+import org.testng.annotations.DataProvider;
+import static org.testng.Assert.assertEquals;
+
+/**
+ * @test
+ * @bug 8212970
+ * @summary Test Negative DST.
+ * @run testng NegativeDSTTest 
+ */
+@Test
+public class NegativeDSTTest {
+
+    private static final TimeZone DUBLIN = TimeZone.getTimeZone("Europe/Dublin");
+    private static final TimeZone PRAGUE = TimeZone.getTimeZone("Europe/Prague");
+    private static final TimeZone WINDHOEK = TimeZone.getTimeZone("Africa/Windhoek");
+    private static final TimeZone CASABLANCA = TimeZone.getTimeZone("Africa/Casablanca");
+    private static final int ONE_HOUR = 3600_000;
+
+    @DataProvider
+    private Object[][] negativeDST () {
+        return new Object[][] {
+            // TimeZone, localDate, offset, isDaylightSavings
+            // Europe/Dublin for the Rule "Eire"
+            {DUBLIN, LocalDate.of(1970, 6, 23), ONE_HOUR, true},
+            {DUBLIN, LocalDate.of(1971, 6, 23), ONE_HOUR, true},
+            {DUBLIN, LocalDate.of(1971, 11, 1), 0, false},
+            {DUBLIN, LocalDate.of(2019, 6, 23), ONE_HOUR, true},
+            {DUBLIN, LocalDate.of(2019, 12, 23), 0, false},
+
+            // Europe/Prague which contains fixed negative savings (not a named Rule)
+            {PRAGUE, LocalDate.of(1946, 9, 30), 2 * ONE_HOUR, true},
+            {PRAGUE, LocalDate.of(1946, 10, 10), ONE_HOUR, false},
+            {PRAGUE, LocalDate.of(1946, 12, 3), 0, false},
+            {PRAGUE, LocalDate.of(1947, 2, 25), ONE_HOUR, false},
+            {PRAGUE, LocalDate.of(1947, 4, 30), 2 * ONE_HOUR, true},
+
+            // Africa/Windhoek for the Rule "Namibia"
+            {WINDHOEK, LocalDate.of(1994, 3, 23), ONE_HOUR, false},
+            {WINDHOEK, LocalDate.of(2016, 9, 23), 2 * ONE_HOUR, true},
+
+            // Africa/Casablanca for the Rule "Morocco" Defines negative DST till 2037 as of 2019a.
+            {CASABLANCA, LocalDate.of(1939, 9, 13), ONE_HOUR, true},
+            {CASABLANCA, LocalDate.of(1939, 11, 20), 0, false},
+            {CASABLANCA, LocalDate.of(2018, 6, 18), ONE_HOUR, true},
+            {CASABLANCA, LocalDate.of(2019, 1, 1), ONE_HOUR, true},
+            {CASABLANCA, LocalDate.of(2019, 5, 6), 0, false},
+            {CASABLANCA, LocalDate.of(2037, 10, 5), 0, false},
+            {CASABLANCA, LocalDate.of(2037, 11, 16), ONE_HOUR, true},
+            {CASABLANCA, LocalDate.of(2038, 11, 1), ONE_HOUR, true},
+        };
+    }
+
+    @Test(dataProvider="negativeDST")
+    public void test_NegativeDST(TimeZone tz, LocalDate ld, int offset, boolean isDST) {
+        Date d = Date.from(Instant.from(ZonedDateTime.of(ld, LocalTime.MIN, tz.toZoneId())));
+        assertEquals(tz.getOffset(d.getTime()), offset);
+        assertEquals(tz.inDaylightTime(d), isDST);
+    }
+}