After two of the sons of Aaron, a High Priest, were killed, Aaron refused to eat the animal sacrifices, saying this would be inappropriate at a time he was mourning the sons' death. Stages of bereavement The process of mourning begins with the first stage, otherwise known as Aninut. During this time, individuals experience the initial shock of their loss. Often emotions associated with the period of Aninut include anger, denial, and disbelief. This is the most extreme period of mourning, and it is at this time in which the keriah, or the rending of the garments, is performed. The stage commences from the moment the individual dies until the end of the funeral. Following Aninut is shiva, in which the mourners delve into seven days dedicated towards remembrance of the deceased individual. Throughout shiva, individuals are instructed to take a break from their routines in order to focus on their loss as well. Following shiva is the stage of mourning known as sheloshim (literally "thirty"). During this period, mourning proceeds for thirty days following the burial. The first seven days of sheloshim is the period of shiva, though sheloshim continues on after shiva has ended. After the intense period of shiva, which is mainly contained to the home, sheloshim allows individuals to leave their residences and begin to interact with others again. Sheloshim encourages individuals to begin to partake in social relations in order to slowly ease back into normal daily activities. Through the final stage, yahrzeit or yizkor, the twelve-month period of mourning ceases and yearly remembrance ceremonies are held for the individual who had died. Computing the timing of shiva and sheloshim The shiva period commences immediately after the burial. The remainder of the day (until sundown) is considered to be the first day of shiva, even though it is only a partial day. On the seventh day (e.g., on Monday, if the first day was Tuesday), shiva ends in the morning after shacharit prayers (if no public services are held on the morning of the seventh day, a service is conducted in the home of the mourner); thus, the seventh day is again a partial day. The sheloshim (thirty-day period of mourning) continues until the end of morning services on the 30th day, 23 days after the end of shiva; as with shiva, the two partial days at the beginning and end are counted as full