For Roman Catholic and Orthodox faiths, All Saints Day honors exemplary Christians who achieved sainthood. This includes unknown Christians and Martyrs who have attained beatific vision (a form of direct knowledge and communication with God).
For many Christian denominations, all Saints Day is a remembrance of departed Christian people of any time and place. Many churches remember the persons in their congregations that have died during the previous year. Churches also celebrate Holy Communion in honor of the Christians who lived before them.