Thank you,
It works perfect but. Is there jalali_to_gregorian too? :)



>Try this:
>

> *    Jalali, a Gregorian to Jalali and inverse date convertor
> * Copyright (C) 2001, 2002  Roozbeh Pournader <roozbeh@farsiweb.info>
> * Copyright (C) 2001, 2002  Mohammad Toossi <mohammad@bamdad.org>
> *
> * This program is free software; you can redistribute it and/or
> * modify it under the terms of the GNU Lesser General Public
> * License as published by the Free Software Foundation; either
> * version 2.1 of the License, or (at your option) any later version.
> * 
> * This program is distributed in the hope that it will be useful,
> * but WITHOUT ANY WARRANTY; without even the implied warranty of
> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> * Lesser General Public License for more details.
> *
> * You can receive a copy of GNU Lesser General Public License at the
> * World Wide Web address <http://www.gnu.org/licenses/lgpl.html>.
> *
> * For licensing issues, contact The FarsiWeb Project Group,
> * Computing Center, Sharif University of Technology,
> * PO Box 11365-8515, Tehran, Iran, or contact us the
> * email address <FWPG@sharif.edu>.
> */
>
>* Changes:
> * 
> * 2002-Feb-19:
> *    Added PHP header and tailer
> * 2002-Jan-28:
> *    First LGPL release
> */
> 
> 
> 
> 
>
>DIMENSION g_days_in_month[12], j_days_in_month[12]
>g_days_in_month[ 1] = 31
>g_days_in_month[ 2] = 28
>g_days_in_month[ 3] = 31
>g_days_in_month[ 4] = 30
>g_days_in_month[ 5] = 31
>g_days_in_month[ 6] = 30
>g_days_in_month[ 7] = 31
>g_days_in_month[ 8] = 31
>g_days_in_month[ 9] = 30
>g_days_in_month[10] = 31
>g_days_in_month[11] = 30
>g_days_in_month[12] = 31
>
>j_days_in_month[ 1] = 31
>j_days_in_month[ 2] = 31
>j_days_in_month[ 3] = 31
>j_days_in_month[ 4] = 31
>j_days_in_month[ 5] = 31
>j_days_in_month[ 6] = 31
>j_days_in_month[ 7] = 30
>j_days_in_month[ 8] = 30
>j_days_in_month[ 9] = 30
>j_days_in_month[10] = 30
>j_days_in_month[11] = 30
>j_days_in_month[12] = 29
>
>j_month_name    = ["Farvardin", "Ordibehesht", "Khordad", "Tir", "Mordad", "Shahrivar", "Mehr", "Aban", "Azar", "Dey", "Bahman", "Esfand"]
>
>
> ooo = gregorian_to_jalali(2012, 1, 21)
> ? ooo.Year, ooo.Month, ooo.Day
>
>
>
>function div(a, b)
>return INT(a / b)
>  
>function gregorian_to_jalali(g_y, g_m, g_d)
>   
>   gy = g_y-1600
>   gm = g_m-1
>   gd = g_d-1
>
>   g_day_no = 365*gy+div(gy+3,4)-div(gy+99,100)+div(gy+399,400);
>
>   for i=1 TO gm
>      g_day_no = g_day_no + g_days_in_month[i]
>   NEXT
>   
>   if (gm > 1 AND ((gy%4==0 AND gy%100!=0) OR (gy%400==0)))
>      g_day_no = g_day_no + 1
>   ENDIF
>   g_day_no = g_day_no + gd
> 
>   j_day_no = g_day_no-79
> 
>   j_np = div(j_day_no, 12053)
>   j_day_no = j_day_no % 12053
> 
>   jy = 979+33*j_np+4*div(j_day_no,1461)
>
>   j_day_no = j_day_no % 1461
> 
>   if (j_day_no >= 366)
>      jy = jy + div(j_day_no-1, 365)
>      j_day_no = (j_day_no-1)%365
>   ENDIF
> 
>   for i = 1 TO 11
>      IF j_day_no >= j_days_in_month[i]
>         j_day_no = j_day_no - j_days_in_month[i]
>      ELSE
>         EXIT
>      ENDIF
>   NEXT
>   jm = i
>   jd = j_day_no+1
>
>   oReturn = CREATEOBJECT([EMPTY])
>   ADDPROPERTY(oReturn,[Year], jy)
>   ADDPROPERTY(oReturn,[Month], jm)
>   ADDPROPERTY(oReturn,[Day], jd)
>RETURN oReturn
>

>Not sure at all if this coverts dates right :-)
>I tested just two dates in here http://i.syavash.com/datec/ and the function returns the same values as the site.