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Table of Contents
Maps
Surveys of Islamic History
Pre-Islamic History of Arabia: The Jahiliyah
History of Islam During the Lifetime of the Prophet and the Rightly Guided Caliphs
History of the Islam in the Middle East after the Rightly Guided Caliphs until 1258 CE: 'Ummayids and Abbasids
History of Islam in East, Central, South, and Southeast Asia
History of Islam in Africa
The Academic Study of Islamic History
Islamic and Middle East History Classes
Comprehensive Islamic History Sites
Converting Dates between Hijri, Julian, and Gregorian Calendars
Conferences
Table of Contents
Maps
Surveys of Islamic History
Pre-Islamic History of Arabia: The Jahiliyah
History of Islam During the Lifetime of the Prophet and the Rightly Guided Caliphs
History of the Islam in the Middle East after the Rightly Guided Caliphs until 1258 CE: 'Ummayids and Abbasids
History of Islam in East, Central, South, and Southeast Asia
History of Islam in Africa
The Academic Study of Islamic History
Islamic and Middle East History Classes
Comprehensive Islamic History Sites
Converting Dates between Hijri, Julian, and Gregorian Calendars
Conferences
Maps of the Muslim World
General Surveys of Islamic HistoryPre-Islamic History of Arabia: The JahiliyahHistory of Islam During the Lifetime of the Prophet and the Rightly Guided Caliphs<Abdullah Ibn Mas'ud 'Abd al-Rahman Ibn Awf Abu Dharr al-Ghifari Abu Musa al-Ash'ari Abu Hurayrah Abu al-Darda 'A'ishah bint Abi Bakr Asma bint Abi Bakr Mu'adh ibn Jabal Sa'd ibn Abi Waqqas Salman al-Farsi History of Islam in the Middle East after the Rightly Guided Caliphs: 'Umayyids and 'AbbasidsHistory of Islam in East, Central, South, and Southeast AsiaHistory of Islam in AfricaThe Academic Study of Islamic HistoryIslamic and Middle East History ClassesComprehensive Islamic History SitesConverting Dates between the Hijri (Islamic) and Gregorian and Julian (i.e. Western) Calendars(Substantially revised, 21 February 2009) Often a student of Islamic Studies will encounter dates written only using the Hijri calendar or dates only in the Gregorian or the Julian calendars. In order to compare events the dates of which are written with different calendar systems, it is necessary to convert such dates to the same system. Hence, it is common for scholars to write the Hijri date followed by the Gregorian or Julian date for a particular event (e.g. for the current year: 1424/2004 or 1424 AH / 2004 CE). For reasons noted below, the conversion is not simply a matter of adding or subtracting years. Hence a formula, computer program, or book of date equivalencies is used to do the conversion. Because the Christian calendar changed from the Julian to the Gregorian calendar in 1582, the general scholarly convention is that for dates before 990/1582, Julian dating should be used. Although the Gregorian calendar was established by Papal bull. on 24 February 1582, Gregorian dating did not begin until October of 1582. More precisely, the last day of the Julian calendar was Thursday, 4 October 1582 (16 Ramadan 990 AH); and then the next day was the beginning of the Gregorian calendar, which was Friday, 15 October 1582 (17 Ramadan 990 AH). The link to the converter below at the Institute of Oriental Studies automatically converts according to the Julian calendar for dates on or before 16 Ramadan 990 AH (4 October 1582). Also, for dates on or after 17 Ramadan 990 AH (15 October 1582), it automatically converts according to the Gregorian calendar.See the following links for converting online between Hijri, Gregorian, and Julian dating as well as other calendars: While the lunar Hijri calendar is used in the Sunni and pre-modern Iranian Shi'i world, Modern Iran uses a solar Hijri calendar that is 621 years less than the Western solar calendar. Converting between these two calendars is simply a matter of subtracting 621 from a CE date or adding 621 to a solar Hijri date. Nevertheless, converting between the lunar Hijri calendar and the solar Western calendar requires a somewhat more complicated calculation. Hence we have provided the links above, which performs the required calculation. Readers interested in more information about the Islamic calendar should consult the article entitled "Islamic Calendar" in the Oxford Encyclopedia of the Modern Islamic World. |