Origin of the Feast.
The feast of All Saints was introduced very early by the Christian Church because of the impossibility of keeping a separate day for every saint. In the fourth century, when the persecutions of the Christians had ceased, the first Sunday after Easter was appointed by the Greek Church as the day for commemorating the martyrs generally.
In the Church of Rome a like festival was introduced about 610 A.D., this being the time when the old heathen Panthéon was consecrated to Mary and all the martyrs.
The real festival of All Saints, however, was first regularly instituted by Pope Gregory IV, in 835, and appointed for the first day of November. It was admitted into England about 870, and probably about the same time into Ireland and Scotland. The festival is common to the Roman Catholic, English, and Lutheran branches of the Church.
The leading idea of Hallowe’en is that it is the time of all others when supernatural influences are strong, and charms, therefore, will not fail to work. Spirits, both good and evil, walk abroad on this one mysterious night, and divination attains its highest power. All who choose may avail themselves of the privileges of the occasion with the certainty that their questions will be answered.