Implementation of java.util.Calendar for the Umm Al-Qura calendar system.
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README.md

ummalqura-calendar

Implementation of java.util.Calendar for the Umm Al-Qura calendar system.
The calculation is valid only for dates from 1356 AH (14 March 1937 CE) to 1500 AH (16 November 2077 CE).

Useful links:

  1. http://www.staff.science.uu.nl/~gent0113/islam/ummalqura.htm.
  2. http://www.ummulqura.org.sa/.

Installation

Maven

<dependency>
	<groupId>com.github.msarhan</groupId>
	<artifactId>ummalqura-calendar</artifactId>
	<version>1.1.9</version>
</dependency>

Gradle

repositories {
	mavenCentral()
}
dependencies {
	compile group: 'com.github.msarhan', name: 'ummalqura-calendar', version:'1.1.9'
}

Usage

// Suppose current gregorian data/time is: Fri Apr 03 18:12:38 AST 2015
UmmalquraCalendar cal = new UmmalquraCalendar();
cal.get(Calendar.YEAR));         // 1436
cal.get(Calendar.MONTH));        // 5 <=> Jumada al-Akhirah
cal.get(Calendar.DAY_OF_MONTH)); // 14

Using parametrized constructor(s)

Calendar cal = new UmmalquraCalendar(1436, UmmalquraCalendar.SHAABAN, 11);
cal.getTime(); // Fri May 29 00:00:00 AST 2015
Calendar cal = new UmmalquraCalendar(1436, UmmalquraCalendar.SHAABAN, 11, 18, 12, 38);
cal.getTime(); // Fri May 29 18:12:38 AST 2015

Get + Set

Calendar cal = new UmmalquraCalendar();
cal.set(Calendar.YEAR, 1436);
cal.set(Calendar.MONTH, UmmalquraCalendar.SHAABAN);
cal.set(Calendar.DAY_OF_MONTH, 11);

cal.getTime(); // Fri May 29 20:57:37 AST 2015
Calendar cal = new UmmalquraCalendar(1436, UmmalquraCalendar.SHAABAN, 11);
cal.get(Calendar.YEAR);         // 1436
cal.get(Calendar.MONTH);        // 7
cal.get(Calendar.DAY_OF_MONTH); // 11

Get month length in days

Calendar cal = new UmmalquraCalendar(1437, UmmalquraCalendar.MUHARRAM, 1);
cal.lengthOfMonth();                                               // 30
// Or using static version:
UmmalquraCalendar.lengthOfMonth(1437, UmmalquraCalendar.MUHARRAM); // 30
UmmalquraCalendar.lengthOfMonth(1437, UmmalquraCalendar.SAFAR);    // 29

Get year length in days

Calendar cal = new UmmalquraCalendar(1437, UmmalquraCalendar.MUHARRAM, 1);
cal.lengthOfYear();                   // 354
// Or using static version:
UmmalquraCalendar.lengthOfYear(1435); // 355	'Leap year'
UmmalquraCalendar.lengthOfYear(1436); // 354
UmmalquraCalendar.lengthOfYear(1437); // 354

Read month or week day name in a given style and java.util.Locale.

Calendar cal = new UmmalquraCalendar(1436, UmmalquraCalendar.RABI_THANI, 21);

cal.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.ENGLISH);         // Rab-II
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, Locale.ENGLISH);          // Rabi' al-Thani

cal.getDisplayName(Calendar.MONTH, Calendar.SHORT, new Locale("ar"));       // ربيع 2
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, new Locale("ar"));        // ربيع الثاني

cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.SHORT, Locale.ENGLISH);   // Tue
cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.ENGLISH);    // Tuesday

cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.SHORT, new Locale("ar")); // ث
cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, new Locale("ar"));  // الثلاثاء

Read month or week day names as a java.util.Map in a given style and java.util.Locale. Where entry key will be the field name and entry value will be the corresponding field value.

Calendar cal = new UmmalquraCalendar();

cal.getDisplayNames(Calendar.MONTH, Calendar.SHORT, Locale.ENGLISH);
//{Thul-Q=10, Rab-I=2, Saf=1, Shw=9, Muh=0, Thul-H=11, Sha=7, Rab-II=3, Raj=6, Ram=8, Jum-I=4, Jum-II=5}
cal.getDisplayNames(Calendar.MONTH, Calendar.LONG, Locale.ENGLISH);
//{Ramadhan=8, Rajab=6, Jumada al-Ula=4, Thul-Qi'dah=10, Sha'ban=7, Muharram=0, Safar=1, Thul-Hijjah=11, Shawwal=9, Rabi' al-Awwal=2, Jumada al-Akhirah=5, Rabi' al-Thani=3}

cal.getDisplayNames(Calendar.MONTH, Calendar.SHORT, new Locale("ar"));
//{جمادى 2=5, رمضان=8, جمادى 1=4, ربيع 2=3, ذو القعدة=10, صفر=1, محرم=0, رجب=6, ربيع 1=2, شوال=9, شعبان=7, ذو الحجة=11}
cal.getDisplayNames(Calendar.MONTH, Calendar.LONG, new Locale("ar"));
//{جمادى الآخرة=5, رمضان=8, ذو القعدة=10, صفر=1, محرم=0, رجب=6, ربيع الثاني=3, جمادى الأولى=4, شوال=9, شعبان=7, ربيع الأول=2, ذو الحجة=11}

cal.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.SHORT, Locale.ENGLISH);
//{Thu=5, Wed=4, Sun=1, Sat=7, Fri=6, Tue=3, Mon=2}
cal.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.ENGLISH);
//{Saturday=7, Thursday=5, Monday=2, Tuesday=3, Wednesday=4, Friday=6, Sunday=1}

cal.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.SHORT, new Locale("ar"));
//{خ=5, ج=6, ح=1, ث=3, س=7, ر=4, ن=2}
cal.getDisplayNames(Calendar.DAY_OF_WEEK, Calendar.LONG, new Locale("ar"));
//{الاثنين=2, الخميس=5, الجمعة=6, الأربعاء=4, الثلاثاء=3, الأحد=1, السبت=7}

Conversion


From Gregorian to Ummalqura

GregorianCalendar gCal = new GregorianCalendar(2012, Calendar.FEBRUARY, 12);
Calendar uCal = new UmmalquraCalendar();
uCal.setTime(gCal.getTime());

uCal.get(Calendar.YEAR);         // 1433
uCal.get(Calendar.MONTH);        // 2
uCal.get(Calendar.DAY_OF_MONTH); // 20

uCal.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.ENGLISH);

From Ummalqura to Gregorian

Calendar uCal = new UmmalquraCalendar(1433, UmmalquraCalendar.RABI_AWWAL, 15);
GregorianCalendar gCal = new GregorianCalendar();
gCal.setTime(uCal.getTime());

gCal.get(Calendar.YEAR);         // 2012
gCal.get(Calendar.MONTH);        // 1
gCal.get(Calendar.DAY_OF_MONTH); // 7

Formatting


You can use java.text.SimpleDateFormat to format Ummalqura date.

Format using English locale

Calendar uCal = new UmmalquraCalendar(1433, UmmalquraCalendar.RABI_AWWAL, 8, 20, 45, 10);
SimpleDateFormat dateFormat = new SimpleDateFormat("", Locale.ENGLISH);
dateFormat.setCalendar(uCal);

dateFormat.applyPattern("d");
dateFormat.format(uCal.getTime()); // 8

dateFormat.applyPattern("dd");
dateFormat.format(uCal.getTime()); // 08

dateFormat.applyPattern("E");
dateFormat.format(uCal.getTime()); // Tue

dateFormat.applyPattern("EEEE");
dateFormat.format(uCal.getTime()); // Tuesday

dateFormat.applyPattern("M");
dateFormat.format(uCal.getTime()); // 3

dateFormat.applyPattern("MM");
dateFormat.format(uCal.getTime()); // 03

dateFormat.applyPattern("MMM");
dateFormat.format(uCal.getTime()); // Rab-I

dateFormat.applyPattern("MMMM");
dateFormat.format(uCal.getTime()); // Rabi' al-Awwal

dateFormat.applyPattern("y");
dateFormat.format(uCal.getTime()); // 1433

dateFormat.applyPattern("yy");
dateFormat.format(uCal.getTime()); // 33

dateFormat.applyPattern("EEEE d MMMM, y");
dateFormat.format(uCal.getTime()); // Tuesday 8 Rabi' al-Awwal, 1433

dateFormat.applyPattern("y/MM/dd");
dateFormat.format(uCal.getTime()); // 1433/03/08

dateFormat.applyPattern("y/MM/dd hh:mm a");
dateFormat.format(uCal.getTime()); // 1433/03/08 08:45 PM

Format using Arabic locale

Calendar uCal = new UmmalquraCalendar(1433, UmmalquraCalendar.RABI_AWWAL, 8, 20, 45, 10);
SimpleDateFormat dateFormat = new SimpleDateFormat("", new Locale("ar"));
dateFormat.setCalendar(uCal);

dateFormat.applyPattern("E");
dateFormat.format(uCal.getTime()); // ث

dateFormat.applyPattern("EEEE");
dateFormat.format(uCal.getTime()); // الثلاثاء

dateFormat.applyPattern("MMM");
dateFormat.format(uCal.getTime()); // ربيع 1

dateFormat.applyPattern("MMMM");
dateFormat.format(uCal.getTime()); // ربيع الأول

dateFormat.applyPattern("EEEE d MMMM, y");
dateFormat.format(uCal.getTime()); // الثلاثاء 8 ربيع الأول, 1433

Parsing


You can use java.text.SimpleDateFormat to parse Ummalqura date.

Parse using English locale

Locale en = Locale.ENGLISH;
UmmalquraCalendar uCal = new UmmalquraCalendar(en);

SimpleDateFormat dateFormat = new SimpleDateFormat("", en);
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
dateFormat.setCalendar(uCal);
uCal.set(Calendar.YEAR, 1420);                  // Used to properly format 'yy' pattern
dateFormat.set2DigitYearStart(uCal.getTime());  // Used to properly format 'yy' pattern

Calendar cal = new UmmalquraCalendar(en);

dateFormat.applyPattern("d/M/y");
cal.setTime(dateFormat.parse("4/7/1435"));
cal.get(Calendar.YEAR);                                      // 1435
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, en);       // Rajab
cal.get(Calendar.DAY_OF_MONTH);                              // 4

dateFormat.applyPattern("MMMM d, y");
cal.setTime(dateFormat.parse("Jumada al-Ula 10, 1436"));
cal.get(Calendar.YEAR);                                      // 1436
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, en);       // Jumada al-Ula
cal.get(Calendar.DAY_OF_MONTH);                              // 10

dateFormat.applyPattern("EEEE, MMMM dd, y");
cal.setTime(dateFormat.parse("Saturday, Sha'ban 07, 1434"));
cal.get(Calendar.YEAR);                                      // 1434
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, en);       // Sha'ban
cal.get(Calendar.DAY_OF_MONTH);                              // 7

dateFormat.applyPattern("EEEE, MMMM d, yy hh:mm:ss");
cal.setTime(dateFormat.parse("Saturday, Jumada al-Ula 23, 36 12:19:44"));
cal.get(Calendar.YEAR);                                      // 1436
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, en);       // Jumada al-Ula
cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, en); // Saturday
cal.get(Calendar.DAY_OF_MONTH);                              // 23

Parse using Arabic locale

Locale ar = new Locale("ar");
UmmalquraCalendar uCal = new UmmalquraCalendar(ar);

SimpleDateFormat dateFormat = new SimpleDateFormat("", ar);
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
dateFormat.setCalendar(uCal);
uCal.set(Calendar.YEAR, 1420);                  // Used to properly format 'yy' pattern
dateFormat.set2DigitYearStart(uCal.getTime());  // Used to properly format 'yy' pattern

Calendar cal = new UmmalquraCalendar(ar);

dateFormat.applyPattern("d/M/y");
cal.setTime(dateFormat.parse("4/7/1435");
cal.get(Calendar.YEAR);                                      // 1435
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, ar);       // رجب
cal.get(Calendar.DAY_OF_MONTH);                              // 4

dateFormat.applyPattern("MMMM d, y");
cal.setTime(dateFormat.parse("جمادى الأولى 10, 1436"));
cal.get(Calendar.YEAR);                                      // 1436
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, ar);       // جمادى الأولى
cal.get(Calendar.DAY_OF_MONTH);                              // 10

dateFormat.applyPattern("EEEE, MMMM dd, y");
cal.setTime(dateFormat.parse("السبت, شعبان 07, 1434"));
cal.get(Calendar.YEAR);                                      // 1434
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, ar);       // شعبان
cal.get(Calendar.DAY_OF_MONTH);                              // 7

dateFormat.applyPattern("EEEE, MMMM d, yy hh:mm:ss");
cal.setTime(dateFormat.parse("السبت, جمادى الأولى 23, 36 12:19:44"));
cal.get(Calendar.YEAR);                                      // 1436
cal.getDisplayName(Calendar.MONTH, Calendar.LONG, ar);       // جمادى الأولى
cal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, ar); // السبت
cal.get(Calendar.DAY_OF_MONTH);                              // 23