Muslims hold night-long vigils on Qadr Nights until dawn.

The night preceding Imam Ali’s martyrdom is considered to be one of the threefold Qadr (Destiny) Nights, when the Holy Qur’an was revealed to Prophet Muhammad more than 14 centuries ago. Muslims hold night-long vigils on Qadr Nights, reciting the holy Qu’ran and praying until dawn.

Attending God’s banquet

Imam Khomeini: If Muslims had collectively entered God’s banquet in this very holy month of Ramadān ...

Sahifeh ye Imam. V 18.P 414

Purification from the impurity of polytheism from Imam Khomeini's viewpoint

Imam Khomeini through his works has stressed that absolute purification from the impurity of polytheism and obtaining perfect authenticity (ikhlas) of devotion is essentially a primary.

Imam used to perform ablution facing the Qibla (prayer direction)

A memoirs by Rashai Noor, One of the Imam's bodyguards

Imam Khomeini: Pray in this holy month so that God almighty would make you successful in acting ...

Sahifeh-ye-Imam. V 18. P 396

Nowruz tourists visiting the historical house of Hazrat Imam in Khomein

Advises and Recommendations of Imam Khomeini about the Holy Month of Ramadan

The blessed month of Ramadan, you should reflect, reform yourselves, and pay attention to God Almighty, seek forgiveness for your unbecoming behavior and deeds, and if, God forbid, you have committed a sin, repent for it prior to entering the blessed month of Ramadan. Habituate your tongue to intimate devotions to God the Almighty