This Java code will print out a list of the locale, country name, iso3166 code, iso639-2 code, and the corresponding date formats used in that country.

LocaleDates

import java.text.SimpleDateFormat;
import java.util.*;
import java.io.*;
import java.text.DateFormat;

// this seems to work for everything but hindi and thailand

public class LocaleDates {

  static public void main(String[] args) throws IOException {

    PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out, "UTF8"));

    Locale[] list = SimpleDateFormat.getAvailableLocales();

    Map<String,List<Locale>> sortedLocales = new TreeMap<String,List<Locale>>();

    for ( Locale locale : SimpleDateFormat.getAvailableLocales() ) {
      if ( locale.getISO3Country() != null && locale.getISO3Country().length() != 0 ) {
        List<Locale> countryLocales = sortedLocales.get(locale.getISO3Country());
        if ( countryLocales == null ) {
          countryLocales = new ArrayList<Locale>();
          sortedLocales.put(locale.getISO3Country(), countryLocales);
        }
        countryLocales.add(locale);
      }
    }

    out.println("ISO 3166 Country Code	ISO639-2 Country Code	Country	ISO 3166 Country Code	ISO639-2 Lang	Language	Date Format");

    for ( String country : sortedLocales.keySet() ) {
      List<Locale> countryLocales = sortedLocales.get(country);
      for ( Locale locale : countryLocales ) {
        DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, locale);
        Calendar c = new GregorianCalendar();
        c.set(Calendar.MONTH, 5);
        c.set(Calendar.DATE, 3);
        c.set(Calendar.YEAR, 2012);

        String dateResults = df.format(c.getTime());

        dateResults = dateResults.replace("2012", "yyyy");
        dateResults = dateResults.replace("12", "yyyy");
        dateResults = dateResults.replace("06", "MM");
        dateResults = dateResults.replace("6", "M");
        dateResults = dateResults.replace("03", "dd");
        dateResults = dateResults.replace("3", "d");

        out.println(locale.getISO3Country() + "\t" + 
                    locale.getCountry() + "\t" + 
                    locale.getDisplayCountry() + "\t" +
                    locale.getISO3Language() + "\t" + 
                    locale.getLanguage() + "\t" + 
                    locale.getDisplayLanguage() + "\t" +
                    dateResults);
      }
    }

    out.flush();

    //System.out.println("total country count " + sortedLocales.size());
  }
}