After the death of his father in 260 AH (873-874 CE), al-Mahdi is believed by the Twelvers to have entered a state of occultation which continues until his rise in the end of time to establish peace and justice on earth.
Following the death of his father in 260 AH (873-874 CE), al-Mahdi is believed by the Twelvers to have entered a period of seclusion that will last until his return at the end of time to establish peace and justice on Earth.