Can Forms be customized to support Jalali Calendar in the Front-End?

Question

One of our prospective customers want to use this Jalali (Persian) calendar.
I changed the NLS_CALENDAR for the session to Persian and this is the SYSDATE SQL output.
SELECT SYSDATE FROM dual;SYSDATE
15 Shahruoar 1389
So, it seems to work.
Now the issue is will our pop-up calendar shown here http://www.freeimagehosting.net/uploads/f257c3997e.jpg in our front also change the month, and dates accordingly. This is utility DATE_LOV developed by Mark Doran we use.
I am unable to change the DB NLS_CALENDAR to Persian to test due to admin problems.
Will the calendar then, show Shahruoar for the month label instead of September?

Answer 1

Yes, but the value set on the database has no effect for your client session. Take a look at the Globalisation Support Guide:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14225/ch3globenv.htm#i1005949
SQL> select * from nls_database_parameters where parameter = 'NLS_CALENDAR';
PARAMETER                     |VALUE
------------------------------|----------------------------------------
NLS_CALENDAR                  |GREGORIAN
SQL> select sysdate from dual;
SYSDATE
07.09.2010 08:18:59
SQL> alter session set nls_calendar=persian;
Session altered.
SQL> select sysdate from dual;
SYSDATE
16 Shahruoar  1389
SQL> select * from nls_database_parameters where parameter = 'NLS_CALENDAR';
PARAMETER                     |VALUE
------------------------------|----------------------------------------
NLS_CALENDAR                  |GREGORIAN
SQL> select * from v$nls_parameters where parameter = 'NLS_CALENDAR';
PARAMETER                                                       |VALUE
----------------------------------------------------------------|----------------------------
NLS_CALENDAR                                                    |Persian
SQL>as you can see the database parameter has nothing to do with the dateformat in my current session.
cheers