Index: contrib/analyzers/common/src/test/org/apache/lucene/analysis/sinks/DateRecognizerSinkTokenizerTest.java
===================================================================
--- contrib/analyzers/common/src/test/org/apache/lucene/analysis/sinks/DateRecognizerSinkTokenizerTest.java	(revision 806943)
+++ contrib/analyzers/common/src/test/org/apache/lucene/analysis/sinks/DateRecognizerSinkTokenizerTest.java	(working copy)
@@ -19,6 +19,7 @@
 import java.io.IOException;
 import java.io.StringReader;
 import java.text.SimpleDateFormat;
+import java.util.Locale;
 
 import junit.framework.TestCase;
 
@@ -41,7 +42,7 @@
   }
 
   public void test() throws IOException {
-    DateRecognizerSinkFilter sinkFilter = new DateRecognizerSinkFilter(new SimpleDateFormat("MM/dd/yyyy"));
+    DateRecognizerSinkFilter sinkFilter = new DateRecognizerSinkFilter(new SimpleDateFormat("MM/dd/yyyy", Locale.US));
     String test = "The quick red fox jumped over the lazy brown dogs on 7/11/2006  The dogs finally reacted on 7/12/2006";
     TeeSinkTokenFilter tee = new TeeSinkTokenFilter(new WhitespaceTokenizer(new StringReader(test)));
     SinkTokenStream sink = tee.newSinkTokenStream(sinkFilter);
Index: src/java/org/apache/lucene/document/DateTools.java
===================================================================
--- src/java/org/apache/lucene/document/DateTools.java	(revision 806943)
+++ src/java/org/apache/lucene/document/DateTools.java	(working copy)
@@ -22,6 +22,7 @@
 import java.util.Calendar;
 import java.util.Date;
 import java.util.TimeZone;
+import java.util.Locale;
 import org.apache.lucene.search.NumericRangeQuery; // for javadocs
 import org.apache.lucene.util.NumericUtils; // for javadocs
 
@@ -52,13 +53,13 @@
   
   private final static TimeZone GMT = TimeZone.getTimeZone("GMT");
 
-  private static final SimpleDateFormat YEAR_FORMAT = new SimpleDateFormat("yyyy");
-  private static final SimpleDateFormat MONTH_FORMAT = new SimpleDateFormat("yyyyMM");
-  private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("yyyyMMdd");
-  private static final SimpleDateFormat HOUR_FORMAT = new SimpleDateFormat("yyyyMMddHH");
-  private static final SimpleDateFormat MINUTE_FORMAT = new SimpleDateFormat("yyyyMMddHHmm");
-  private static final SimpleDateFormat SECOND_FORMAT = new SimpleDateFormat("yyyyMMddHHmmss");
-  private static final SimpleDateFormat MILLISECOND_FORMAT = new SimpleDateFormat("yyyyMMddHHmmssSSS");
+  private static final SimpleDateFormat YEAR_FORMAT = new SimpleDateFormat("yyyy", Locale.US);
+  private static final SimpleDateFormat MONTH_FORMAT = new SimpleDateFormat("yyyyMM", Locale.US);
+  private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("yyyyMMdd", Locale.US);
+  private static final SimpleDateFormat HOUR_FORMAT = new SimpleDateFormat("yyyyMMddHH", Locale.US);
+  private static final SimpleDateFormat MINUTE_FORMAT = new SimpleDateFormat("yyyyMMddHHmm", Locale.US);
+  private static final SimpleDateFormat SECOND_FORMAT = new SimpleDateFormat("yyyyMMddHHmmss", Locale.US);
+  private static final SimpleDateFormat MILLISECOND_FORMAT = new SimpleDateFormat("yyyyMMddHHmmssSSS", Locale.US);
   static {
     // times need to be normalized so the value doesn't depend on the 
     // location the index is created/used:
Index: src/test/org/apache/lucene/document/TestDateTools.java
===================================================================
--- src/test/org/apache/lucene/document/TestDateTools.java	(revision 806943)
+++ src/test/org/apache/lucene/document/TestDateTools.java	(working copy)
@@ -5,6 +5,7 @@
 import java.util.Calendar;
 import java.util.Date;
 import java.util.TimeZone;
+import java.util.Locale;
 
 import org.apache.lucene.util.LuceneTestCase;
 
@@ -172,7 +173,7 @@
   }
 
   private String isoFormat(Date date) {
-    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
+    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS", Locale.US);
     sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
     return sdf.format(date);
   }