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  2. Arabic numerals - Wikipedia

    en.wikipedia.org/wiki/Arabic_numerals

    The 2, 8, and 9 resemble Arabic numerals more than Eastern Arabic numerals or Indian numerals. Leonardo Fibonacci was a Pisan mathematician who had studied in the Pisan trading colony of Bugia , in what is now Algeria , [ 15 ] and he endeavored to promote the numeral system in Europe with his 1202 book Liber Abaci :

  3. Timeline of numerals and arithmetic - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_numerals_and...

    12th century — Indian numerals have been modified by Persian mathematicians al-Khwārizmī to form the modern Arabic numerals (used universally in the modern world.) 12th century — the Arabic numerals reach Europe through the Arabs. 1202 — Leonardo Fibonacci demonstrates the utility of Hindu–Arabic numeral system in his Book of the Abacus.

  4. Abbasid Caliphate - Wikipedia

    en.wikipedia.org/wiki/Abbasid_Caliphate

    In the early 8th century, the family converted to Islam and began to take on a sizable part of the civil administration for the Abbasids. [197] Capital poured into the caliphate's treasury from a variety of taxes, including a real estate tax; a levy on cattle, gold and silver, and commercial wares; a special tax on non-Muslims; and customs dues ...

  5. History of the Arabic alphabet - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Arabic_alphabet

    Nabataean Arabic was succeeded by Paleo-Arabic, termed as such because it dates to the pre-Islamic period in the fifth and sixth centuries CE, but is also recognizable in light of the Arabic script as expressed during the Islamic era. Finally, the standardization of the Arabic alphabet during the Islamic era led to the emergence of classical ...

  6. Timeline of the history of Islam - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_history_of...

    This timeline of Islamic history relates the Gregorian and Islamic calendars in the history of Islam. This timeline starts with the lifetime of Muhammad, which is believed by non-Muslims to be when Islam started, [ 1 ] though not by Muslims .

  7. Islamic calendar - Wikipedia

    en.wikipedia.org/wiki/Islamic_calendar

    Islamic calendar stamp issued at King Khalid International Airport on 10 Rajab 1428 AH (24 July 2007 CE). The Hijri calendar (Arabic: ٱلتَّقْوِيم ٱلْهِجْرِيّ, romanized: al-taqwīm al-hijrī), or Arabic calendar, also known in English as the Muslim calendar and Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 or 355 days.

  8. Hijri year - Wikipedia

    en.wikipedia.org/wiki/Hijri_year

    The Hijri year (Arabic: سنة هجرية, romanized: sanat hijriyya) or era (Arabic: التقويم الهجري, romanized: at-taqwīm al-hijrī) is the era used in the Islamic lunar calendar. It begins its count from the Islamic New Year in which Muhammad and his followers migrated from Mecca to Yathrib (now Medina) in 622 CE.

  9. List of Islamic years - Wikipedia

    en.wikipedia.org/wiki/List_of_Islamic_years

    This is a list of Hijri years (Latin: anno Hegirae or AH) with the corresponding common era years where applicable. For Hijri years since 1297 AH (1879/1881 CE), the Gregorian date of 1 Muharram, the first day of the year in the Islamic calendar, is given.