Arbaeen Date 2024au. The arbaeen— arabic for the number 40 and traditionally marks the end of a mourning period — is now the world’s largest annual gathering and far. This holiday commemorates the martyrdom of husayn ibn ali, who was the grandson of the prophet muhammad and was martyred on the 10th day of the islamic month.

Arbaeen is a national holiday in iran, observed on the 40th day after ashura, the martyrdom anniversary of imam hussein, the grandson of prophet. This holiday commemorates the martyrdom of husayn ibn ali, who was the grandson of the prophet muhammad and was martyred on the 10th day of the islamic month.