Secular holiday : Seyyed Ruhollah Khomeini (May 17, 1900? - June 3, 1989) was a Shi'a Muslim cleric, and the political and spiritual leader of the 1979 Iranian Revolution which saw the overthrow of Mohammad Reza Pahlavi, the last Shah of Iran. Following the Revolution, Khomeini held the office of Supreme Leader, the paramount figure in the political system of the new Islamic Republic, and retained this position until his death. Khomeini was considered a spiritual leader to many Shi'a Muslims, and in Iran is officially addressed as Imam rather than Ayatollah. Khomeini was also a highly influential and innovative Islamic political theorist, most noted for his development of the theory of the guardianship of the jurisconsult . Wikipedia

Secular holiday : On the afternoon of June 3, 1963, Khomeini delivered a speech in which he warned the Shah that if he did not change his ways the day would come when the people would offer up thanks for his departure from the country. The immediate effect of the Imam's speech was his arrest two days later at 3 a.m. by a group of commandos, who hastily transferred him to the Qasr Prison in Tehran. As dawn broke on June 4, the news of his arrest spread first through Qom and then to other cities. Masses of angry demonstrators were confronted by tanks and ruthlessly slaughtered. It was not until six days later that order was fully restored. This uprising of Khordad 15, 1342 (the day in the Iranian calendar on which it began) marked a turning point in Iranian history. The events of the 15th of Khordadcan indeed be characterized as the prelude to the Islamic Revolution of 1978-79.

Culture : Marks the death anniversary of the celebrated Iranian children author Mehdi Azar Yazdi

Sports events : Www.les-sports.info bicycle championship 2023 edition confirmed

Culture : On this day flowers are planted in green areas, the Martyry Section of the Behesht Zahra cemetery is showered with flowers

Tradeshows : Www.iran-foodbevtec.com lasts 4 days - in Tehran 2023 edition CONFIRMED

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Muslim, Sufi : Anniversary commemorating Muhammad's last sermon at Ghadir Khumm, which occurred 18th of Dhu al-Hijjah of 10 AH in the Islamic calendar. It is an event celebrated by Shi'a Muslims, who regard it as the confirmation of Ali ibn Abi Talib's succession to Muhammad (Wikipedia)

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Secular holiday : Tasu'a is the day when army of Yazid besieged Hazret-e-Imam Hosein and His companions to fight against them. In remembrance of the great sacrifices of Hazret-e-Imam Hosein and his 72 friends, processions persist across Iran. Mourners attend religious ceremonies.

Muslim, Sufi : Husayn ibn Ali martyrdom day, killed in the year 680 in Kerbala (Iraq) fighting injustice.

Secular holiday : The name simply means 40 in Arabic, and celebrates the 40th and last day of the mourning period for Imam Hussein, killed on the flat plain outside Karbala in 680 CE. Since Ashura is the date of his martyrdom, Arbain is always observed 40 days after Ashura. http://www.cbi.ir/about/holidays.asp

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Muslim, Sufi : Imam Reza (766 - 818) 8th shia, Imam Reza ( 766-818) was poisoned caliph Al-Ma'mun. Buried in Mashhad.

Culture : Commemorates poet Hossein Behjat Tabrizi (1906-1988)

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Secular holiday : (c. 846 – 874) was the 11th Imam of Twelver Shia Islam, after his father Ali al-Hadi. He was also called Abu Muhammad and Ibn al-Ridha. Because Samarra, the city where he lived, was a garrison town, he is generally known as al-Askari (Askar is the word for military in Arabic). Al-Askari married Narjis Khatun and was kept under house arrest or in prison for most of his life, until, according to some Shia sources, he was poisoned at the age of 28 on the orders of the Abbasid caliph Al-Mu'tamid and was buried in Samarra. It was known that many Shia were looking forward to the succession of his son, Muhammad al-Mahdi, as they believed him to be the twelfth Imam, who was destined to remove injustice from the world. [Wikipedia]

Secular holiday : Sadegh Khalkhali (July 27, 1926 – November 26, 2003) was a Twelver Shi'a cleric of the Islamic Republic of Iran who is said to have brought to his job as Chief Justice of the revolutionary courts a relish for summary execution that earned him a reputation as Iran's hanging judge .

Culture : On 4 November 1978 the Shah troops opened fire inside Tehran University, killing several student protestors

Secular holiday : Prophet Mohammad's daughter and one of the most inspiring figures for Shiite Muslims. Fatima died in the holy city of Medina in current Saudi Arabia. Shiites believe that she died while trying to protect her husband Imam Ali from his enemies. That's why they regard her as a martyr. The exact place of her burial still remains a mystery after more than 14 centuries.

Culture : The longest and darkest night of the year is a time when friends and family gather together to eat, drink and read poetry (especially Hafez) until well after midnight. Fruits and nuts are eaten and pomegranates and watermelons are particularly significant. The red color in these fruits symbolizes the crimson hues of dawn and glow of life. The poems of Divan-e-Hafez, which can be found in the bookcases of most Iranians families, are intermingled with peoples' life and are read or recited during various occasions like this festival and at Nowruz. [Wikipedia]