Zevachim 100: Gathering Bones Marks a Day of Mourning

Some brief notes on today's daf:

• the laws of an onen, a priest who is in acute mourning
• a baraita teaches that the day one learns about the death of a close relative is treated as if it is the day of burial
• the week following burial is shiva, and the month following burial is shloshim
• regarding the laws of korban Pesach, the Paschal offering, it is considered to be like the day that one's ancestor's bones are collected, which allow him to consume terumah in the evening
• The Gemara discusses a melaket atzamot, one who collects his/her relatives' bones for final burial
• During and after the Second Temple period, people were burring in temporary plots and then their bones were moved to an ossuary, a stone box, which would be placed in the family's burial cave
• the day of gathering the bones was named as a day of mourning
• The Gemara notes that the case at hand would regard someone else doing the gathering of the bones, for anyone who touched bones would be tameh, ritually impure, and thus could not partake of the Pesach offering