By the ninth century, however, 1 November had become the predominant date for the feast of All Saints’, and over the course of the next few centuries it was gradually supplemented by a second commemoration the following day.
By the later Middle Ages, these days formed a coherent and widely observed season of remembrance, known in medieval England as “Hallowtide”. The two days had distinct but related aims: All Saints’ was intended to celebrate the glorious dead and to ask for their prayers, but the purpose of All Souls’ was to pray for the dead, for those in Purgatory who needed the prayers of the living to help them in their passage to heaven. It was a time not only to remember the dead but to look after them, to give them assistance and comfort. On the nights of Hallowtide, church bells rang out to reassure the souls in Purgatory that the living had not forgotten them. It must have been profoundly comforting to the grieving, too, to feel that they could still do something to help those they had lost.