diff --git a/icu4j/src/com/ibm/icu/dev/test/format/DateTimeGeneratorTest.java b/icu4j/src/com/ibm/icu/dev/test/format/DateTimeGeneratorTest.java
index e07fd24c9d8..4f328fcfdd3 100644
--- a/icu4j/src/com/ibm/icu/dev/test/format/DateTimeGeneratorTest.java
+++ b/icu4j/src/com/ibm/icu/dev/test/format/DateTimeGeneratorTest.java
@@ -23,7 +23,7 @@ import java.util.Random;
 import java.util.ResourceBundle;
 
 public class DateTimeGeneratorTest extends TestFmwk {
-    public static boolean GENERATE_TEST_DATA = false;
+    public static boolean GENERATE_TEST_DATA = System.getProperty("GENERATE_TEST_DATA") != null;
     public static int RANDOM_COUNT = 1000;
     public static boolean DEBUG = false;
     
@@ -121,7 +121,7 @@ public class DateTimeGeneratorTest extends TestFmwk {
                 if (GENERATE_TEST_DATA) logln("new ULocale(\"" + uLocale.toString() + "\"),");
             } else if (dateTestData[i] instanceof Date) {
                 date = (Date) dateTestData[i];
-                if (GENERATE_TEST_DATA) logln("new Date(" + date.getYear() + ", " + date.getMonth() + ", " + date.getDay() + ", " + date.getHours() + ", " + date.getMinutes() + ", " + date.getSeconds()+ "),");
+                if (GENERATE_TEST_DATA) logln("new Date(" + date.getYear() + ", " + date.getMonth() + ", " + date.getDate() + ", " + date.getHours() + ", " + date.getMinutes() + ", " + date.getSeconds()+ "),");
             } else if (dateTestData[i] instanceof String) {
                 String testSkeleton = (String) dateTestData[i];
                 String pattern = dtfg.getBestPattern(testSkeleton);
@@ -162,7 +162,7 @@ public class DateTimeGeneratorTest extends TestFmwk {
     
     // can be generated by using GENERATE_TEST_DATA. Must be reviewed before adding
     static final Object[] dateTestData = {
-        new Date(99, 0, 3, 23, 58, 59),
+        new Date(99, 0, 13, 23, 58, 59),
         new ULocale("en_US"),
         new String[] {"yM", "1/1999"},
         new String[] {"yMMM", "Jan 1999"},