Calendar for Dey 1404: Events, Official Holidays, and Key Highlights

Dey 1404, the tenth month of the Persian Solar Hijri calendar and the first month of winter in Iran, spans 30 days from Sunday, December 21, 2025 (1 Dey) to Monday, January 19, 2026 (30 Dey). It overlaps with parts of the Islamic lunar month of Rajab 1447 and marks the transition from 2025 to 2026 in the Gregorian calendar, with New Year's Day falling on 11 Dey.

According to Iran's official calendar, Dey 1404 features 6 public holidays: 4 weekly Fridays and 2 official national holidays:

• 13 Dey: Birthday of Imam Ali (AS) – Father's Day and Global Day of Resistance (official holiday).
• 27 Dey: Prophet Muhammad's (PBUH) Mission (Mab'ath) (official holiday).

Note: Fridays are always official weekly holidays. Additional closures may occur due to weather, air quality, or government announcements.

Complete List of Events in Dey 1404

The following is a comprehensive list of key dates and observances, based on official Iranian sources:

• 1 Dey: Birthday of Imam Muhammad al-Baqir (AS) – Barber's Day
• 3 Dey: Martyrdom of Imam Ali al-Hadi (AS) – Civil Registry Day
• 4 Dey: Commemoration of Rudaki – Birthday of Jesus Christ (AS) (Christmas observed by some)
• 5 Dey: National Day for Safety Against Earthquakes and Natural Disasters
• 6 Dey: Notaries Public Day
• 7 Dey: Establishment of the Literacy Movement
• 8 Dey: Petrochemical Industry Day – Cement Industry Day
• 9 Dey: Day of Insight and the 9 Dey Epic (2009 demonstrations)
• 10 Dey: Birthday of Imam Muhammad al-Taqi (AS)
• 11 Dey: Start of the Gregorian New Year 2026 (January 1)
• 12 Dey: Commemoration of Allameh Mohammad Taqi Mesbah Yazdi – Humanities Day
• 13 Dey: Birthday of Imam Ali (AS) – Father's Day – Start of Ayyam al-Baydh (spiritual retreat) – Global Resistance Day – Anniversary of Martyrdom of General Qasem Soleimani (official holiday)
• 15 Dey: Passing of Hazrat Zainab (SA)
• 16 Dey: Student Martyrs Day
• 17 Dey: Commemoration of Khwaju Kermani – Kerman Province Day
• 19 Dey: Bloody Uprising of Qom People (January 9, 1978)
• 20 Dey: Martyrdom of Mirza Taqi Khan Amir Kabir – Confectionery and Chocolate Industry Day
• 25 Dey: Martyrdom of Imam Musa al-Kadhim (AS)
• 26 Dey: Anniversary of the Shah's Flight (January 16, 1979)
• 27 Dey: Prophet Muhammad's (PBUH) Mission (Mab'ath) – Martyrdom of Navvab Safavi and companions (official holiday)
• 29 Dey: Gaza Day – Vehicle Technical Inspection Day – Clean Air Day

Najaf Dispatch: Inside the Imam Ali Shrine | PBS News

Key Highlights of Dey 1404

• This month is rich in religious observances, particularly Shi'a Islamic events like birthdays and martyrdoms of Imams, alongside national historical commemorations.
• The coincidence with the Gregorian New Year provides an opportunity to celebrate or acknowledge international festivities.
• The two official holidays (13 and 27 Dey) are ideal for family gatherings, travel, or religious activities, potentially extending into long weekends if adjacent to Fridays.

This calendar is compiled from reliable Iranian sources, including the Geophysics Institute of Tehran University and official announcements. Final confirmations come from government bodies; always check for any updates.