One is not an onen whenever a body may not be buried, such as on Shabbat and Jewish festivals, and so there is no onenut on Shabbat or Jewish festivals. An onen says blessings and does mitzvot on those days.

Some communities have the custom of an onen's saying kaddish.
NOTE When a person's parent dies on or just before (erev) Shabbat or a Jewish festival, a daughter of any age should not be told until after Shabbat or the festival is over. A son should only be told if he is 6 years old and above and the custom in that community is to say kaddish as an onen.

An onen who accompanies a body to a foreign country for burial may have two extra days (or more) of onenut. If the onen then returns home and joins other mourners in the shiv'a house, the onen may end shiv'a with the other family members. (For more details, see When Shiv'a (and Shloshim) Starts: Normal Days .)