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 2039?

The main Islamic events in September 2039 include: Birth of Imam al-Mahdi (as), Beginning of the Major Occultation, Death of Khadijah al-Kubra (as).

2039 Calendar

Shia Calendar September 2039

View the complete Shia calendar for September 2039. This month features 3 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 2039 contains 3 Shia Islamic events. This includes 1 commemoration marking solemn remembrances. There is 1 celebration during this month. All dates show both Hijri and Gregorian equivalents.

•3 Shia Islamic events in September 2039
•1 commemoration 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 2039

The Shia calendar for September 2039 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 2039.

All Events in September 2039

4Sep

Celebration

Birth of Imam al-Mahdi (as)

On July 29, AD 869, Imam Mahdi was born amid divine light, testifying to God's oneness, prophets' prophethood, and ancestors' Imamate while bowing toward the qiblah. Angels descended to congratulate Imam Hasan, and the infant recited holy books of past prophets. Archangel Rizwan washed him, Imam Hasan transferred wilayah and recited adhan. Green birds (angels led by Gabriel) took the newborn to God's Throne, where He affirmed Mahdi's role as the last proof, promising justice through him.

15 Sha'ban 1461 AH

4Sep

Event

Beginning of the Major Occultation

The Major Occultation began in 328 A.H. after Ali bin Muhammad Samari's death, with deputyship passing to great jurists; the Imam communicated via letters and audiences to Shia scholars like Shaykh Mufeed. Hypocrites like Ahmad bin Hilal, Hasan Sharii, Husain bin Mansur al Hallaj, and Muhammad bin Ali Shalmaghani falsely claimed deputyship due to jealousy or greed, promoting deviations and facing curses or execution. H

15 Sha'ban 1461 AH

28Sep

Commemoration

Death of Khadijah al-Kubra (as)

Khadīja bt. Khuwaylid (a), known as Khadīja al-Kubrā (a) and Umm al-Mu'minīn, was the first wife of Prophet Muhammad (s) and mother of Lady Fatima (a). She married him 15 years before Bi'tha (595 CE) and was the first woman to convert to Islam, dedicating her wealth to its expansion. The Prophet (s) did not marry another during her lifetime and always praised her. She died in 4 BH/619 in Mecca and is buried in al-Ma'lat Cemetery in Mount al-Hajun.

10 Ramadan 1461 AH

Key Takeaways

13 Shia Islamic events in September 2039
21 commemoration this month
31 celebration this month
4All dates in Hijri and Gregorian formats
5Events can be added to your personal calendar
6Dates accurate for 2039 (shift ~11 days each year)

Frequently Asked Questions

There are 3 Islamic events in September 2039, including 1 commemorations and 1 celebrations.