Iranians, other Muslims attend mourning processions in millions to mark Tasu'a

Millions of Muslims across Iran and other countries are taking part in nationwide processions on Tasu'a, which marks the ninth day of the lunar calendar month of Muharram and precedes Ashura, the day when Imam Hussein, the third Shia imam, was martyred.

Tasua and Ashura, the day of loyalty and resistance of Imam Hussain and his faithful companions

Imam Khomeini: Muharram has proven that the right always defeats the wrong throughout history.

Sahifeh-ye-Imam. V 5, P 184

Imam attending mourning ceremonies at the month of Muharram.

Imam remained present from the beginning to end at Muharram ceremonies

A memoirs by Hojjat al-Islam Ansari Kermani

Imam Khomeini called Muharram the month of sacrifice.

Imam Khomeini: The respected pilgrims should follow the guidelines and proposals of the ...

Sahifeh-ye-Imam. V 16, P 439

Historical background of 15th of Khordad uprising

The demonstrations of June 5, 1963, known as 15th of Khordad Uprising, were the public protest against the arrest of Ayatollah Ruhollah Khomeini in 1963.