The Hajj pilgrimage

The Hajj is an annual Islamic pilgrimage to Mecca, the most holy city for Muslims, and a mandatory religious duty for Muslims that must be carried out at least once in their lifetime by all adult Muslims who are physically and financially capable of undertaking the journey, and can support their family during their absence.

It is one of the five pillars of Islam, alongside Shahadah, Salat, Zakat, and Sawm. The Hajj is the largest annual gathering of people in the world. The state of being physically and financially capable of performing the Hajj is called istita'ah, and a Muslim who fulfills this condition is called a mustati. The Hajj is a demonstration of the solidarity of the Muslim people, and their submission to God (Allah). The word Hajj means "to intend a journey", which connotes both the outward act of a journey and the inward act of intentions.

The pilgrimage occurs from the 8th to 12th (or in some cases 13th) of Dhu al-Hijjah, the last month of the Islamic calendar. Because the Islamic calendar is lunar and the Islamic year is about eleven days shorter than the Gregorian year, the Gregorian date of Hajj changes from year to year. Ihram is the name given to the special spiritual state in which pilgrims wear two white sheets of seamless cloth and abstain from certain actions.

The Hajj is associated with the life of Islamic prophet Muhammad from the 7th century, but the ritual of pilgrimage to Mecca is considered by Muslims to stretch back thousands of years to the time of Abraham. During Hajj, pilgrims join processions of hundreds of thousands of people, who simultaneously converge on Mecca for the week of the Hajj, and perform a series of rituals: each person walks counter-clockwise seven times around the Kaaba (the cube-shaped building and the direction of prayer for the Muslims), runs back and forth between the hills of Safa and Marwah, drinks from the Zamzam Well, goes to the plains of Mount Arafat to stand in vigil, spends a night in the plain of Muzdalifa, and performs symbolic stoning of the devil by throwing stones at three pillars. The pilgrims then shave their heads, perform a ritual of animal sacrifice, and celebrate the three-day global festival of Eid al-Adha.

The present pattern of Hajj was established by Muhammad. However, according to the Quran, elements of Hajj trace back to the time of Abraham. According to Islamic tradition, Abraham was ordered by God to leave his wife Hajara and his son Ishmael alone in the desert of ancient Mecca. In search of water, Hajara desperately ran seven times between the two hills of Safa and Marwah but found none. Returning in despair to Ishmael, she saw the baby scratching the ground with his leg and a water fountain sprang forth underneath his foot. Later, Abraham was commanded to build the Kaaba (which he did with the help of Ishmael) and to invite people to perform pilgrimage there. The Quran refers to these incidents in verses 2:124-127 and 22:27-30.[n 1] It is said that the archangel Gabriel brought the Black Stone from Heaven to be attached to the Kaaba.

In pre-Islamic Arabia, a time known as jahiliyyah, the Kaaba became surrounded by pagan idols. In 630 CE, Muhammad led his followers from Medina to Mecca, cleansed the Kaaba by destroying all the pagan idols, and then reconsecrated the building to Allah. In 632 CE, Muhammad performed his only and last pilgrimage with a large number of followers, and instructed them on the rites of Hajj. It was from this point that Hajj became one of the five pillars of Islam.

During the medieval times, pilgrims would gather in big cities of Syria, Egypt, and Iraq to go to Mecca in groups and caravans comprising tens of thousands of pilgrims, often under state patronage. Hajj caravans, particularly with the advent of the Mamluk Sultanate and its successor, the Ottoman Empire, were escorted by a military force accompanied by physicians under the command of an amir al-hajj. This was done in order to protect the caravan from Bedouin robbers or natural hazards,[n 2] and to ensure that the pilgrims were supplied with the necessary provisions. Muslim travelers like Ibn Jubayr and Ibn Battuta have recorded detailed accounts of Hajj-travels of medieval time. The caravans followed well-established routes called in Arabic darb al-hajj, lit. "pilgrimage road", which usually followed ancient routes such as the King's Highway.

The date of Hajj is determined by the Islamic calendar (known as Hijri calendar or AH), which is based on the lunar year. Every year, the events of Hajj take place in a five-day period, starting on 8 and ending on 12 Dhu al-Hijjah, the twelfth and last month of the Islamic calendar. Among these five days, the 9th Dhul-Hijjah is known as Day of Arafah, and this day is called the day of Hajj. Because the Islamic calendar is lunar and the Islamic year is about eleven days shorter than the Gregorian year, the Gregorian date for Hajj changes from year to year. Thus, each year in the Gregorian calendar, the pilgrimage starts eleven days (sometimes ten days) earlier than the preceding year. This makes it possible for the Hajj season to fall twice in one Gregorian year, and it does so every 33 years.