The Hijri calendar (Islamic calendar or Islamic lunar calendar) is the foundation of Muslim worship and the spiritual life of believers. Unlike the Gregorian calendar, it follows the cycle of the moon rather than the sun, making each Muslim year approximately 11 days shorter. Understanding the 12 months of the Islamic calendar allows you to grasp the key moments of religious life, including the famous month of Ramadan and the four sacred months particularly respected in Islam.

In this comprehensive guide, explore the history of the Hijra, discover each month with its characteristics and important events, and learn the fundamental differences between the Muslim calendar system and the Gregorian calendar. We also offer you a curated selection of products to deepen your knowledge of this essential dimension of Islam.

What is the Hijri calendar and where does it come from?

The Hijri calendar begins in the year 622 of the common era, the year of the Hijra - the migration of the Prophet Muhammad (peace be upon him) from Mecca to Medina. This year becomes the zero year of the Islamic calendar and marks a decisive turning point in the history of Islam. Before this historic migration, Muslims used the Meccan and Medinan calendar in a more informal manner. It was the Caliph Omar Ibn Al-Khattab who, during his mandate in the 7th century, officially institutionalized the Hijri calendar based on the lunar cycle.

Each Hijri year corresponds to 12 lunar months, which represents approximately 354 or 355 days (13 days less than a solar year). This explains why Islamic months gradually regress in the Gregorian calendar, allowing each season to pass through all times of the year over time. This system creates a particular harmony where spiritual practices like Ramadan fasting change seasons every approximately 33 years.

The 12 months of the Hijri calendar

Each month of the Islamic calendar bears a specific Arabic name with its own meaning and spiritual significance. Here is the complete list of the 12 Hijri months:

  • Muharram - The month of commemoration and renewal
  • Safar - The month without major specific events
  • Rabi' al-Awwal - The first month of Islamic spring - Birth of the Prophet
  • Rabi' al-Thani - The second month of Islamic spring
  • Jumada al-Awwal - The first month of desiccation
  • Jumada al-Thani - The second month of desiccation
  • Rajab - The month of reverence (one of the four sacred months)
  • Sha'ban - The month of division and preparation for Ramadan
  • Ramadan - The month of fasting and revelation of the Quran
  • Shawwal - The month of relief and celebration (Eid al-Fitr)
  • Dhul-Qi'dah - The month of rest (one of the four sacred months)
  • Dhul-Hijjah - The month of pilgrimage to Mecca (one of the four sacred months)

Rabi' al-Awwal: The Birth of Prophet Muhammad

Rabi' al-Awwal is a month particularly celebrated because it marks the birth of Prophet Muhammad (peace be upon him), on the 12th day according to the majority of Muslim scholars. This month also represents the first month of the Islamic spring. Muslims around the world commemorate this sacred occasion on Mawlid al-Nabawi, a moment of great joy and gratitude to Allah for this gift to humanity.

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The Four Sacred Months (Al-Ashurul-Hurum)

Islam places particular importance on four months designated as sacred in the Quran. During these months, fighting is forbidden and the atmosphere is charged with respect and piety. The four sacred months are:

  • Rajab - Particularly venerated for additional acts of piety
  • Dhul-Qi'dah - Month of preparation for pilgrimage
  • Dhul-Hijjah - Month of Hajj and welcoming pilgrims to Mecca
  • Muharram - Month of commemoration of Prophet Noah and major spiritual events

The month of Muharram is particularly significant as it marks the beginning of the Islamic year. The 10th night of Muharram, called Ashura, carries great spiritual importance. The 9th day (Tassouaa) and the 10th day are commemorated by optional but highly recommended fasting.

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Ramadan: the month of fasting and revelation

Ramadan is undoubtedly the most important month of the Islamic calendar for Muslims around the world. During this ninth month, the Quran was revealed to the Prophet Muhammad (peace be upon him) in its entirety. Muslims fast from sunrise to sunset, abstaining from food, drink and other physical needs, while strengthening their spiritual connection to Allah.

Ramadan represents a period of spiritual transformation, self-discipline and empathy towards those suffering from hunger and poverty. It is also the month of the Night of Destiny (Laylat al-Qadr), the most blessed night of the year according to the Quran, when the revelation of the Quran began.

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Shawwal: The Month of Celebration and Relief

Shawwal is the tenth month and immediately follows Ramadan. It begins with the joyful celebration of Eid al-Fitr, the Festival of Breaking the Fast. It is a month filled with joy, family and gratitude towards Allah after a full month of fasting and spiritual discipline.

The first day of Shawwal marks the official beginning of Eid al-Fitr, a festive event where Muslims gather to pray, celebrate and share meals. After intensive Ramadan, Shawwal offers a sense of relief and spiritual accomplishment.

Dhul-Hijjah: the month of Hajj and pilgrimage

Dhul-Hijjah is the twelfth and final month of the Islamic year. It is the month of Hajj, the pilgrimage to Mecca which represents the fifth pillar of Islam. Approximately two million Muslims gather each year in Mecca to undertake this transformative spiritual journey.

Dhul-Hijjah is also characterized by Eid al-Adha, the Festival of Sacrifice, celebrated on the 10th day of the month. This festival commemorates Abraham's willingness to sacrifice his son in obedience to Allah. During this period, the rituals of Hajj take place according to a precise schedule established since the time of Prophet Muhammad (peace be upon him).

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Other important months of the Islamic calendar

Muharram, as mentioned previously, begins the Muslim year and holds particular great importance. Fasting on the day of Ashura (10th day) is highly recommended and offers immense spiritual rewards.

Rajab, one of the four sacred months, is a month of increased devotion. The Night of the Night Journey (Isra and Mi'raj), commemorated on the 27th day of Rajab, marks the miraculous journey of the Prophet Muhammad (peace be upon him) to Jerusalem and his ascension to heaven.

Sha'ban is the month of immediate preparation for Ramadan. Muslims often begin fasting a few days of Sha'ban to prepare their body and spirit for the sacred month. The Night of the Middle of Sha'ban (Laylat al-Nisf min Sha'ban) is also a special night of prayer where the destinies of the year are decided according to several Islamic traditions.

Differences between the Hijri calendar and the Gregorian calendar

The Gregorian calendar (Western calendar) and the Hijri calendar operate according to fundamentally different principles. Here are the main distinctions:

  • Astronomical basis: The Gregorian calendar follows the solar cycle (365.25 days/year), while the Hijri calendar follows the lunar cycle (354-355 days/year)
  • Length of the year: The Hijri year is approximately 11 days shorter, causing a progressive shift with the Gregorian seasons
  • Mobile dates: Ramadan, Eid al-Fitr and Eid al-Adha change dates each year in the Gregorian calendar
  • Synchronization of seasons: Approximately every 33 years, a Muslim month will regress completely from one season to another in the Gregorian calendar
  • Astronomical observations: The Hijri calendar depends on the observation of the new moon, while the Gregorian calendar is strictly mathematical

This difference creates a unique richness: it means that Muslim spiritual practices are not attached to a specific season, but are gradually distributed across all climatic environments and all periods of the year.

The Importance of the Hijri Calendar in Muslim Life

The Hijri calendar is not a simple method of counting days. It is a system deeply rooted in Islamic faith that organizes the spiritual life of believers. It reflects the connection between the physical world and the divine world, reminding Muslims that time itself is a creation of Allah with a particular purpose.

By following the Hijri calendar, Muslims align themselves with 14 centuries of uninterrupted tradition dating back to the Prophet Muhammad (peace be upon him) and the Hijra, this founding journey that gave birth to the first established Muslim community in Medina.

Key spiritual events by month

Each month of the Islamic calendar is marked by spiritual events and occasions for increased devotion. Understanding these important moments allows Muslims to live their faith in a more conscious and intentional way throughout the year.

Additional and Related Resources

For a more complete understanding of the Hijri calendar and its importance in Islam, we recommend exploring the following resources:

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The Hijri calendar represents much more than a simple system of measuring time. It is a living expression of Muslim faith, a continuous connection with the Hijra of Prophet Muhammad (peace be upon him) and a spiritual guide that helps believers live in harmony with the rhythms of Islamic worship.

By understanding the 12 months of the Islamic calendar, the four sacred months, and the importance of key moments such as Ramadan and the Hajj, you enrich your religious practice and your connection to prophetic traditions.