festivals of All Saints' and All Souls' days'.

的諸聖節和追思已亡節 密切相關 。

Especially the practice called  souling where the poor would go  

尤其是一種叫做「靈魂」的習俗，窮人會到處

around asking for a pastry called soul cake  with the promise of praying for the donor's  

索取一種叫做「靈魂蛋糕」的糕點，並承諾為捐贈者

deceased loved ones. Which later became  the tradition of trick or treating.

已故的親人祈禱。這後來成為「不給糖就搗蛋」的傳統。