FULL PRODUCT VERSION :
JDK1.7.0_01

ADDITIONAL OS VERSION INFORMATION :
Windows 7

A DESCRIPTION OF THE PROBLEM :
SimpleDateFormat class gives invalid date for "29-lutego-2012", however it validates and parse 29-luty-2012

lutego and luty means February in english locale.

REGRESSION. Last worked in version 7

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Set Polish locale to your Java application
2. Create instance of SimpleDateFormat
3. Pass string value 22 lutego 2012 to parse

See the code snippet:



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Value should parse and display "Wed Feb 22 00:00:00 IST 2012" on console
ACTUAL -
Exception

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.text.ParseException: Unparseable date: "22 lutego 2012"
at java.text.DateFormat.parse(Unknown Source)
at TestDateFormat.main(TestDateFormat.java:22)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;


public class TestPolishDateFormat {
public static void main(String[] args) {
Locale locale = new Locale("pl", "PL");
//Set polish local
Locale.setDefault(locale);
//Get instance of SimpleDateFormat
SimpleDateFormat longFormat = (SimpleDateFormat) DateFormat.getDateInstance(DateFormat.LONG);

try {

Date date = longFormat.parse("22 luty 2012"); // This value parse successfully
System.out.println(date);

date = longFormat.parse("22 lutego 2012"); // This fails
System.out.println(date);
} catch (ParseException e) {
e.printStackTrace();
}
}
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
For Polish locale use luty instead of lutego for February month