Hijrah in the context of "Yathrib"

The Hijri calendar (Arabic: ٱلتَّقْوِيم ٱلْهِجْرِيّ, romanized: al-taqwīm al-hijrī), also known in English as the Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 or 355 days. It is used to determine the proper days of Islamic holidays and rituals, such as the annual fasting and the annual season for the great pilgrimage. In almost all countries where the predominant religion is Islam, the civil calendar is the Gregorian calendar, with Syriac month-names used in the Levant and Mesopotamia (Iraq, Syria, Jordan, Lebanon and Palestine), but the religious calendar is the Hijri one.

This calendar enumerates the Hijri era, whose epoch was established as the Islamic New Year in 622 CE. During that year, Muhammad and his followers migrated from Mecca to Medina and established the first Muslim community (ummah), an event commemorated as the Hijrah. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, lit. 'In the year of the Hijrah'). In Muslim countries, it is also sometimes denoted as H from its Arabic form (سَنَة هِجْرِيَّة, abbreviated ھ). In English, years prior to the Hijra are denoted as BH ("Before the Hijra").

Ali ibn Abi Talib (Arabic: عَلِيُّ بْن أَبِي طَالِب, romanized: ʿAlī ibn Abī Ṭālib) (c. 600 – 661 CE) was the fourth Rashidun caliph who ruled from 656 CE until his assassination in 661, as well as the first Shia Imam. He was the cousin and son-in-law of the Islamic prophet Muhammad. Born to Abu Talib ibn Abd al-Muttalib and Fatima bint Asad, Ali was raised by his elder cousin Muhammad and was among the first to accept his teachings.

Ali played a pivotal role in the early years of Islam when Muslims were severely persecuted in Mecca. After the immigration (hijra) to Medina in 622, Muhammad gave his daughter Fatima to Ali in marriage and swore a pact of brotherhood with him. Ali served as Muhammad's secretary and deputy in this period, and was the flag bearer of his army. Numerous sayings of Muhammad praise Ali, the most controversial of which was uttered in 632 at the Ghadir Khumm, "Whoever I am his mawla, then Ali is his mawla." The interpretation of the polysemous Arabic word mawla is disputed: For Shia Muslims, Muhammad thus invested Ali with his religious and political authority, while Sunni Muslims view this as a mere statement of friendship and rapport. When Muhammad died in the same year, a group of Muslims met in the absence of Ali and appointed Abu Bakr (r. 632–634) as their leader. Ali later relinquished his claims to leadership and resigned from public life during the reigns of Abu Bakr and his successor, Umar (r. 634–644). Even though his advice was occasionally sought, the conflicts between Ali and the first two caliphs are epitomized by his refusal to follow their practices. This refusal cost Ali the caliphate to the benefit of Uthman (r. 644–656), who was thus appointed to succeed Umar by the electoral council. Ali was also highly critical of Uthman, who was widely accused of nepotism and corruption. Yet Ali also repeatedly mediated between the caliph and the provincial dissidents angered by his policies.

The first Islamic state was established by the Islamic prophet Muhammad in Medina in 622 under the Constitution of Medina. It represented the political unity of the Muslim Ummah (nation). After Muhammad's death, his companions known as the Rightly Guided Caliphs (Rashidun) founded the Rashidun Caliphate (632–661), which began massive expansion and motivated subsequent Islamic states, such as the Umayyad Caliphate (661–750) and Abbasid Caliphate (750–1258).

Muhammad came to the city of Medina following the migration of his followers in what is known as the Hijrah (migration to Medina) in 622. He had been invited to Medina by city leaders to adjudicate disputes between clans from which the city suffered, and was received positively by the city's Jewish and pagan residents as an arbitrator. As a result, he was accepted by popular consensus as the city's political leader, establishing the first Islamic state with his role.

Medina, officially al-Madinah al-Munawwarah, also known as Taybah and known in pre-Islamic times as Yathrib, is the capital and administrative centre of Medina Province in the Hejaz region of western Saudi Arabia. It is one of the oldest and most important places in Islamic history. The second holiest city in Islam, the population as of 2022 is 1,477,023, making it the fourth-most populous city in the country. Around 58.5% of the population are Saudi citizens and 41.5% are foreigners. Located at the core of the Medina Province in the western reaches of the country, the city is distributed over 589 km (227 sq mi), of which 293 km (113 sq mi) constitutes the city's urban area, while the rest is occupied by the Hejaz Mountains, empty valleys, agricultural spaces and older dormant volcanoes.

Medina is generally considered to be the "cradle of Islamic culture and civilization". The city is considered to be the second-holiest of three key cities in Islamic tradition, with Makkah and Jerusalem serving as the holiest and third-holiest cities respectively. Al-Masjid al-Nabawi (lit. 'The Prophet's Mosque') is of exceptional importance in Islam and serves as burial site of the prophet Muhammad, by whom the mosque was built in 622 CE (first year of the Hijrah). Observant Muslims usually visit his tomb, or rawdhah, at least once in their lifetime during a pilgrimage known as Ziyarat, although this is not obligatory. The original name of the city before the advent of Islam was Yathrib (Arabic: يَثْرِب), and it is referred to by this name in Chapter 33 (Al-Aḥzāb, lit. 'The Confederates') of the Quran. It was renamed to Madīnat an-Nabī (lit. 'City of the Prophet' or 'The Prophet's City') after and later to al-Madinah al-Munawwarah (lit. 'The Enlightened City') before being simplified and shortened to its modern name, Madinah (lit. 'The City'), from which the English-language spelling of "Medina" is derived. Saudi road signage uses Madinah and al-Madinah al-Munawwarah interchangeably.

A surah (/ˈsʊərə/; Arabic: سُورَة, romanized: sūrah; pl. سُوَر, suwar) is an Arabic word meaning "chapter" in the Quran. There are 114 surah in the Quran, each divided into verses (Arabic: آيات, romanized: āyāt, lit. 'signs'). The surah are of unequal length; the shortest surah ("al-Kawthar") has only three verses, while the longest (al-Baqarah) contains 286 verses. The Quran consists of one short introductory chapter (Q1), eight very long chapters, making up one-third of the Quran (Q2‒9); 19 mid-length chapters, making up another one-third (Q10‒28); and 86 short and very short ones of the last one-third (Q29‒114).

Of the 114 surah in the Quran, 86 are classified as Meccan (Arabic: مكي, romanized: makkī), as according to Islamic tradition they were revealed before Muhammad's migration to Medina (hijrah), while 28 are Medinan (Arabic: مدني, romanized: madanī), as they were revealed after. This classification is only approximate in regard to the location of revelation; any surah revealed after the migration is termed Medinan and any revealed before it is termed Meccan, regardless of where the surah was revealed. However, some Meccan surah contain Medinan verses (verses revealed after the migration) and vice versa. Whether a surah is Medinan or Meccan depends on if the beginning of the surah was revealed before or after the migration.

In Islam, Muhammad (Arabic: مُحَمَّد) is venerated as the Seal of the Prophets who transmitted the eternal word of God (Qur'ān) from the angel Gabriel (Jibrīl) to humans and jinn. Muslims believe that the Quran, the central religious text of Islam, was revealed to Muhammad by God, and that Muhammad was sent to guide people to Islam, which is believed not to be a separate religion, but the unaltered original faith of mankind (fiṭrah), and believed to have been shared by previous prophets including Adam, Abraham, Moses, and Jesus. The religious, social, and political tenets that Muhammad established with the Quran became the foundation of Islam and the Muslim world.

According to Muslim tradition, Muhammad was sent to the Arabic community to deliver them from their immorality. Receiving his first revelation at age 40 in a cave called Hira in Mecca, he started to preach the oneness of God in order to stamp out idolatry of pre-Islamic Arabia. This led to opposition by the Meccans, with Abu Lahab and Abu Jahl as the most famous enemies of Muhammad in Islamic tradition. This led to persecution of Muhammad and his Muslim followers who fled to Medina, an event known as the Hijrah, until Muhammad returned to fight the idolaters of Mecca, culminating in the semi-legendary Battle of Badr, conceived in Islamic tradition not only to be a battle between the Muslims and pre-Islamic polytheists, but also between the angels on Muhammad's side against the jinn and false deities siding with the Meccans. After victory, Muhammad is believed to have cleansed Arabia from polytheism and advised his followers to renounce idolatry for the sake of the unity of God.

The Prophet's Mosque (Arabic: ٱلْمَسْجِد ٱلنَّبَوِي‎, romanized: al-Masjid al-Nabawī, lit. 'Mosque of the Prophet') is the second mosque built by the Islamic prophet Muhammad in Medina, after the Quba Mosque, as well as the second largest mosque and holiest site in Islam, after the Masjid al-Haram in Mecca, in the Saudi region of the Hejaz. The mosque is located at the heart of Medina, and is a major site of pilgrimage that falls under the purview of the Custodian of the Two Holy Mosques (a royal style used by the King of Saudi Arabia.)

Muhammad himself was involved in the construction of the mosque. At the time, the mosque's land belonged to two young orphans, Sahl and Suhayl, and when they learned that Muhammad wished to acquire their land to erect a mosque, they went to Muhammad and offered the land to him as a gift; Muhammad insisted on paying a price for the land because they were orphaned children. The price agreed upon was paid by Abu Ayyub al-Ansari, who thus became the endower or donor (Arabic: وَاقِف, romanized: wāqif) of the mosque, on behalf or in favor of Muhammad. al-Ansari also accommodated Muhammad upon his arrival at Medina in 622.

The Hijri era (Arabic: التقويم الهجري, romanized: at-taqwīm al-hijrī) is the calendar era used to record dates in the Islamic world. Its epoch (start point of the era) is the year in which Muhammad and his followers migrated from Mecca to Yathrib (now Medina), in 622 CE. This event, known as the Hijrah, is commemorated in Islam for its role in the founding of the first Muslim community (ummah). Time in this era is measured by two principal calendars: the lunar Hijri calendar (known in the West as the "Islamic calendar") which counts lunar years since the Hijrah and which is used by most Muslims around the world; and the solar Hijri calendar (also known as the "Persian calendar") which counts solar years since the Hijrah and which is used in Iran.

In the West, dates in the lunar Hijri calendar are denoted as AH (Latin: Anno Hegirae) or Hijri year (Arabic: سنة هجرية, romanized: sanat hijriyya, lit. 'in the year of the Hijra') in the style of the Christian/Common (AD/CE) and Jewish eras (AM) and can similarly be placed before (preferably) or after the date. In predominantly Muslim countries, it is also commonly abbreviated H ("Hijra") from its Arabic abbreviation hāʾ (هـ). Years prior to AH 1 are reckoned in English as BH ("Before the Hijra"), which follows the date. Dates in the solar Hijri calendar are denoted as SH. The current year according to the lunar Hijri calendar is AH 1447; according to the solar Hijri calendar the current year is SH 1404. The difference in numbering arises because a lunar year is about eleven days shorter than a solar year.

The Islamic New Year (Arabic: رأس السنة الهجرية, Raʿs as-Sanah al-Hijrīyah), also called the Hijri New Year, is the day that marks the beginning of a new lunar Hijri year, and is the day on which the year count is incremented. The first day of the Islamic year is observed by most Muslims on the first day of the month of Muharram. The epoch (reference date) of the Islamic era was set as the year of the emigration of Muhammad and his followers from Mecca to Medina, known as the Hijrah, which equates to 622 CE in the Gregorian calendar. All religious duties, such as prayer, fasting in the month of Ramadan, and pilgrimage, and the dates of significant events, such as celebration of holy nights and festivals, are calculated according to the Islamic calendar. Hijri New Year is observed by 24 countries as a public holiday.

While some Islamic organizations prefer determining the new month (and hence the new year) by local sightings of the moon, most Islamic institutions and countries, including Saudi Arabia, follow astronomical calculations to determine future dates of the Islamic calendar. There are various schemas for calculating the tabular Islamic calendar (i.e. not based on observation), which results in differences of typically one or even two days between countries using such schema and those that use actual lunar sightings. For example, the Umm al-Qura calendar used in Saudi Arabia was reformed several times in recent years. The current scheme was introduced in 1423 AH (15 March 2002).