In Christianity, All Souls' Day commemorates the faithful departed, in particular (but not exclusively) one's relatives. In Western Christianity the annual celebration is now held on 2 November and is associated with All Saints' Day (1 November) and its vigil, Halloween (31 October). In the liturgical books of the western Catholic Church (the Latin Church) it is called the Commemoration of All the Faithful Departed, and is celebrated annually on 2 November, even if this date falls on a Sunday; on this day Catholics pray for the dead. In Anglicanism it is called Commemoration of All Faithful Departed and is an optional celebration; Anglicans view All Souls' Day as an extension of the observance of All Saints' Day and it serves to "remember those who have died", in connection with the theological doctrines of the resurrection of the body and the Communion of Saints. In the Eastern Orthodox Church and the associated Eastern Catholic Churches, it is celebrated several times during the year and is not associated with the month of November.
Beliefs and practices associated with All Souls' Day vary widely among Christian churches and denominations.