Have you ever have a look at PersianCalendar?
http://sourceforge.net/projects/persiancalendar
it is a rather complete library. It is based on ICU4J of IBM. Although it doesn't implement Sun calendar  class directly but many concepts are similar.

What I mean is implementing sun's Calendar and date classes  directly.
Working with date  GUI components, forces you pass Calendar sub classes where ever needed and that's while implementing those classes for Persian date does not look like a rigid task.

you may also consider the new data api (JSR 310)

About one year ago I have decided to contribute a Persian calendar  but what I found was that they don't accept any contributor from Iran. You have to sign forms and send it back to the Sun but Iran is not listed on their countries so consequently you can't get involved in any Sun's project that is why in all Iranian software companies you see a different version of Persian Calendar they have designed for their requirements and after these many years we have still no Persian calendar in Java!!!

Should we really care if a company like Sun does interfere policies with a non-political activity like programming?

Regarding the issue  you just mentioned, I should appreciate open source projects and communities for their angles of view and manners toward separating politicians from ordinary programmers who intend to make this world a better place.

Also, why not just extending the Calendar classes  along any classes we need  and make up a Jar file out of them and distribute this library for those who need. Will Sun have any complaint? should we care?

Besides, I've heard things about java  going open source, is it a rummer or sth?

I think a good way to go is to form a standardization body from volunteers, that is supported and managed by an organization such as Computer Association.

This group can then collect, organize, review and publish contributions to anything related to our nation.



It can have a local – Sun Microsystems role.



This also should be limited to pieces that contribute to the fundamentals, such as calendars and stuff.

(Parallel to what Sun is doing)

Having a place to host all types of open source projects is not a good idea, as there is a lot of web sites doing that on the net.



Any comments?

Specially from those who are close to organizations like Computer Association?

Isn’t this possible?

I do agree,
Seems like a nice idea and I'm in.

What I stated was because you insist to contribute the Persian calendar  based on java.util.Calendar and yes you may create your own source codes and nobody would complains. Although this is already implemented as the other friends told you and you can find it on sourceforge website.

And, yes, JDK is under the open source license, namely OpenJDK. you can go through following links but still you can't contribute and get involved in their open source projects.

http://www.sun.com/software/opensource/java/
http://openjdk.java.net/
http://openjdk.java.net/projects/jdk6

And for your information you can't browse the projects in above links because you access it from a sanctioned country! you have to go with a proxy software or an Anti-filter