Why do Islamic dates change each year?

Islamic dates follow the Hijri lunar calendar, which has 354-355 days per year (about 11 days shorter than the Gregorian calendar). This means Islamic events shift approximately 11 days earlier each Gregorian year.

How accurate are these Islamic dates?

Our dates are calculated using astronomical algorithms. However, some Islamic dates (like Ramadan) are traditionally determined by moon sighting, which may vary by 1-2 days depending on location and religious authority.

What are the main Islamic events in September 2026?

The main Islamic events in September 2026 include: Treaty of Peace between Imam al-Hasan (as) and Muawiyah, Martyrdom of Fatima al-Zahra (as), Birth of Imam al-Askari (as), and 2 more events.

2026 Calendar

Shia Calendar September 2026

View the complete Shia calendar for September 2026. This month features 5 significant Islamic dates observed by Shia Muslims worldwide, with accurate Hijri to Gregorian date conversions for your planning needs.

Last updated: February 22, 2026

Summary

September 2026 contains 5 Shia Islamic events. This includes 2 commemorations marking solemn remembrances. There is 1 celebration during this month. All dates show both Hijri and Gregorian equivalents.

•5 Shia Islamic events in September 2026
•2 commemorations this month
•1 celebration this month
•All dates in Hijri and Gregorian formats
•Events can be added to your personal calendar

Shia Calendar for September 2026

The Shia calendar for September 2026 shows all Islamic events falling within this Gregorian month. Because the Islamic Hijri calendar is lunar-based (354-355 days per year), the specific events in any given Gregorian month change from year to year. This page shows exactly which Shia religious dates occur during September 2026.

All Events in September 2026

9Sep

Event

Treaty of Peace between Imam al-Hasan (as) and Muawiyah

Mu'awiya sent al-Hasan a blank stamped page to stipulate peace treaty conditions, which al-Hasan filled with terms beneficial to him, his family, and Shi'a. Historians provide scattered details, with one claiming a complete text refuted by others. Key items include: authority handover conditional on following Quran, Sunna, and righteous Caliphs; succession to al-Hasan then al-Husayn; ceasing curses against Ali; financial provisions like treasury exclusion, annual payments, and martyr compensations; security for all, especially Ali's companions, without pursuit or harm. Mu'awiya confirmed with writing, oath, and witnesses in mid-Jumada al-Ula, 41 AH.

26 Rabi al-Awwal 1448 AH

21Sep

Commemoration

Martyrdom of Fatima al-Zahra (as)

After the Prophet's death, a group of up to 4000 men, led by Umar ibn Khattab, demanded Ali ibn Abi-Talib's allegiance to Abu Bakr at Fatima tuz Zahra's door. Ali, preparing the Qur'an, refused. They threatened to burn the house, set fire to the door, kicked it in, injuring Fatima—breaking her rib and causing miscarriage of Al-Muhassin. On her deathbed, Fatima requested a secret night burial attended by few loyal companions like Ali, al-Hassan, al-Husayn, Ammar bin Yasir, and Salman al-Muhammadi. Her grave's location remains unknown. Ali, who lifted Khaybar's gates effortlessly, wept unable to lift her body.

8 Rabi al-Thani 1448 AH

23Sep

Celebration

Birth of Imam al-Askari (as)

Imam Hasan al-Askari, the Eleventh Imam, was born in 232 Hijri in Madina and died in 260 Hijri in Samarra at age 28, after a 6-year Imamate under house arrest. Titled Askari for living in a garrison town, he taught Quran, wrote a Tafseer, and performed miracles like exposing a priest's rain trick and praying for rain. He married Nargis Khatoon, a Rum princess who converted via dreams, mother to his son Muhammad. Despite sufferings, he educated students and converted atheists. Poisoned by Caliph al-Mu’tamid, his 5-year-old son led his funeral prayer before disappearing. Buried with his father in Samarra.

10 Rabi al-Thani 1448 AH

23Sep

Commemoration

Death of Fatima al-Masuma (as)

Lady Fatima Masuma (A), daughter of Imam Musa al-Kazim (A) and Najmah Khatun, was born on 1st Dhul Qa`dah 173 A.H. in Medina and died in Qum in 201 A.H. at age 28. Imams foretold her birth and burial in Qum over 45 years prior, promising paradise for her visitors and intercession for Shia. Known as Masuma and Karimat Ahl al-Bayt, she remained unmarried due to lack of suitable spouses amid persecution. A knowledgeable narrator of traditions, she was highly influenced by her father and brother, Imam Ali al-Rida (A).

10 Rabi al-Thani 1448 AH

27Sep

Event

Uprising of al-Mukhtar al-Thaqafi to Avenge Imam al-Hussain (as)

The chapter examines Shi’ism's origins in political caliphal struggles, involving oligarchic timocracy and marginalized resistance, intertwined with religion unlike Western church-state separation. It details early divisions after Imams ‘Ali, Hasan, and Husayn, focusing on Mukhtar al-Thaqafi's 685-686 Kufah insurrection as enlightened messianic activist, avenging Husayn's death on behalf of Muhammad Ibn al-Hanafiyyah as Mahdi. Shi’ism is a metaphysical restoration of Prophethood through Imams' wilayah, not mere politics or founded by figures like Ibn Saba’.

14 Rabi al-Thani 1448 AH

Key Takeaways

15 Shia Islamic events in September 2026
22 commemorations this month
31 celebration this month
4All dates in Hijri and Gregorian formats
5Events can be added to your personal calendar
6Dates accurate for 2026 (shift ~11 days each year)

Frequently Asked Questions

There are 5 Islamic events in September 2026, including 2 commemorations and 1 celebrations.