They mourn for Hussein ibn Ali and refrain from all joyous events. Unlike Sunni Muslims, Shias do not fast on the 10th day of Muharram. In addition there is an important Ziyarat book, the Ziyarat Ashura about Hussein ibn Ali. In the Shia sect it is popular to read this ziyarat on the “Day of Ashura”, although most of the Shias try to read Ziyarat Ashura every day and they send salutations to Hussein ibn Ali.