Question

Whilst christianity came up with the whole ‘all hallows eve' thing, many of the traditions were already firmly established by a pre-christian peoples, whose beliefs are usually referred to as _____ .

Answer 1

The correct answer is - All Soul's day.

In Christianity, All Souls' Day commemorates All Souls, the Holy Souls, or the Faithful Departed; that is, the souls of Christians who have died. 

It may have originally been a tradition where people impersonated the Aos Sí, or the souls of the dead, and received offerings on their behalf, which is similar to the custom of souling. Impersonating these beings, or wearing a disguise, was also believed to protect oneself from them.

Answer 2

The answer of the question is "All souls day"
This day in the christianity  this day remarked with holy souls which means it linked to the souls of the christian which have already died. It is named as "The Commemoration of the Faithful Departed" in the church of the england . This day is special for remembering the dead one's . There are wide concepts about this day and so celebrated in some areas for a day in a year like in the western christanity 2 november is the day of celebration. On the other hand sometimes it is not associated to a single month but celebrated multiple time in the years.