<code type="java">
package astroLib;
import java.util.Calendar;
/**
* @author http://www.cepmuvakkit.com
*/
public class HijriCalendar {
private Calendar cal;
private double MJD;
private String ismiSuhiri[] = {
"MUHARRAM", "SAFAR", "REBIULAVVAL", "REBIULAHIR",
"JAMIZIALAVVAL", "JAMIZIALAHIR", "RAJAB", "SHABAN",
"RAMADHAN", "SHAVVAL", "ZILKADE", "ZILHICCE"};
private int Lunation;
private int hijriYear, hijriMonth, hijriDay;
private boolean[] isFound;
private double newMoonMoment; //Calculated time for the New Moon in ModifiedJulianDays UTC
private double crescentMoonMoment; // Calculated time for the Crescent Moon in ModifiedJulianDays UTC
final double synmonth = 29.530588861;// Synodic Month Period
final double dT = 7.0 / 36525.0; // Step (1 week)
final double dTc = 3.0 / 36525.0; // Step (3 days)
final double Acc = (0.5 / 1440.0) / 36525.0; // Desired Accuracy (0.5 min)
final double MJD_J2000 = 51544.5;
final double MLunatBase = 23435.90347;
// Modified Base date for E. W. Brown's numbered series of
// lunations (1923 January 16 02:41) 2423436-2400000.5=23435.5
// 2423436.40347 23435,9034699998
// which is solved according to the 8 degrees elongation angle.
// private double timeDifferenceforET_UT; // Correction variable due to difference of ephemeris time and universal time
public HijriCalendar(int Year, int Month, int Day) {
this.MJD = APC_Time.Mjd(Year, Month, Day, 0, 0, 0);
cal = APC_Time.CalDat(MJD);
double Tnow, T0, T1, TNewMoon, TCrescent; // Time( Ephemeris:disabled) in Julian centuries since J2000
double D0, D1;
Tnow = (MJD - MJD_J2000) / 36525.0;
T1 = Tnow;
T0 = T1 - dT; // decrease 1 week
isFound = new boolean[1];
isFound[0] = false;
// Search for phases bracket desired phase event
MoonPhases newMoon = new NewMoon();
MoonPhases crescentMoon = new CrescentMoon();
D1 = newMoon.calculatePhase(T1);
D0 = newMoon.calculatePhase(T0);
while ((D0 * D1 > 0.0) || (D1 < D0)) {
T1 = T0;
D1 = D0;
T0 -= dT;
D0 = newMoon.calculatePhase(T0);//Finds correct week for iteration
}
// Iterate NewMoon time
TNewMoon = APC_Math.Pegasus(newMoon, T0, T1, Acc, isFound);
// Correct for difference of ephemeris time and universal time currently disabled
// ETminUT ( TPhase, ET_UT, valid );
newMoonMoment = (TNewMoon * 36525.0 + MJD_J2000);// - ET_UT/86400.0;
Lunation = (int) Math.floor((newMoonMoment + 7 - MLunatBase) / synmonth) + 1;
// 1341 (29 CemuzuyelEvvel) is the hicri day for the 17 January 1923
// which is the start day of the Brown's Lunation Number;
hijriYear = (Lunation + 4) / 12 + 1341;
// Returns 1 for Muharrem 2 for Safer .... 12 for Zilhicce
hijriMonth = (Lunation + 4) % 12 + 1;
if (isFound[0]) {
TCrescent = APC_Math.Pegasus(crescentMoon, TNewMoon, TNewMoon + dTc, Acc, isFound);
crescentMoonMoment = TCrescent * 36525.0 + MJD_J2000;
}
hijriDay = (int) (MJD - Math.round(crescentMoonMoment + 0.279166666666667)) + 1;
//0.279166666666667 comes from the hours 5:18 am
if (hijriDay == 0) {
hijriDay = 30;
hijriMonth--;
if (hijriMonth == 0) {
hijriMonth = 12;
}
}
}
public int getHijriYear() {
return hijriYear;
}
public String getHijriMonthName() {
return ismiSuhiri[(hijriMonth - 1)];
}
public int getHijriMonth() {
return hijriMonth;
}
public int getHijriDay() {
return hijriDay;
}
public String getHicriTakvim() {
return getHijriDay() + " " + getHijriMonthName() + " " + getHijriYear();
}
/**
* 1 Muharrem=Hijri New Year
* 10 Muharrem= Day of Ashura
* 11/12 Rebiulevvel= Mawlid-al Nabi
* 1 Recep=Start of Holy Months
* 1st Cuma day on Recep= Lailatul-Raghaib
* 27 Recep=Lailatul-Me'rac
* 14/15 Nisfu-Sha'aban
* 1 Ramadhan=1. Day of Ramadhan
* 27 Ramadhan= Lailatul-Qadr
* 1 Sevval=1. Day of Eid-al-Fitr
* 2 Sevval=2. Day of Eid-al-Fitr
* 3 Sevval=3. Day of Eid-al-Fitr
* 9 ZiLHiCCE= A'rafa
* 10 Zilhicce= 1. Day of Eid-al-Adha
* 11 Zilhicce= 2. Day of Eid-al-Adha
* 12 Zilhicce= 3. Day of Eid-al-Adha
* 13 Zilhicce= 4. Day of Eid-al-Adha
* @return
*/
public String checkIfHolyDay() {
String holyDay = "";
switch (hijriMonth) {
case 1:
if (hijriDay == 1) {
holyDay = "NEWYEAR";
} else if (hijriDay == 10) {
holyDay = "ASHURA";
}
break;
case 3:
if ((hijriDay == 11) || (hijriDay == 12)) {
holyDay = "MAWLID";
}
break;
case 7:
if ((hijriDay == 1) && (hijriMonth == 7)) {
holyDay = "HOLYMONTHS";
}
if ((cal.get(Calendar.DAY_OF_WEEK) == 6) && (hijriDay < 7)) {
holyDay = "RAGHAIB";
}
if (hijriDay == 27) {
holyDay = "MERAC";
}
break;
case 8:
if (/*(hijriDay==14)||*/(hijriDay == 15)) {
holyDay = "BARAAT";
}
break;
case 9:
if ((hijriDay == 27)) {
holyDay = "QADR";
}
break;
case 10:
if ((hijriDay == 1) || (hijriDay == 2) || (hijriDay == 3)) {
holyDay = hijriDay + "DAYOFEIDFITR";
}
break;
case 12:
if (hijriDay == 9) {
holyDay = "AREFE";
}
if ((hijriDay == 10) || (hijriDay == 11) || (hijriDay == 12) || (hijriDay == 13)) {
holyDay = (hijriDay - 9) + "DAYOFEIDAHDA";
}
break;
}
return holyDay;
}
public String getDay() {
String daysName[] = {"SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY"};
return daysName[cal.get(Calendar.DAY_OF_WEEK) - 1];
}
/*
//------------------------------------------------------------------------------
//
// ETminUT: Difference ET-UT of ephemeris time and universal time
//
// Input:
//
// T Time in Julian centuries since J2000
//
// Output:
//
// DTsec ET-UT in [s]
// valid Flag indicating T in domain of approximation
//
// Notes: The approximation spans the years from 1825 to 2005
//
//------------------------------------------------------------------------------
void getETDifferenceInMinUT (double T, double& DTsec, bool& valid)
{
//
// Variables
//
int i = (int) floor(T/0.25);
double t = T-i*0.25;
if ( (T<-1.75) || (0.05<T) ) {
valid = false;
DTsec = 0.0;
}
else {
valid = true;
switch (i) {
case -7: DTsec=10.4+t*(-80.8+t*( 413.9+t*( -572.3))); break; // 1825-
case -6: DTsec= 6.6+t*( 46.3+t*(-358.4+t*( 18.8))); break; // 1850-
case -5: DTsec=-3.9+t*(-10.8+t*(-166.2+t*( 867.4))); break; // 1875-
case -4: DTsec=-2.6+t*(114.1+t*( 327.5+t*(-1467.4))); break; // 1900-
case -3: DTsec=24.2+t*( -6.3+t*( -8.2+t*( 483.4))); break; // 1925-
case -2: DTsec=29.3+t*( 32.5+t*( -3.8+t*( 550.7))); break; // 1950-
case -1: DTsec=45.3+t*(130.5+t*(-570.5+t*( 1516.7))); break; // 1975-
case 0: t+=0.25;
DTsec=45.3+t*(130.5+t*(-570.5+t*( 1516.7))); // 2000-
} // 2005
}
}*/
}
</code>
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