mythology that has a name with a similar spelling, but he has nothing to do with death or with that particular holiday.
Some people also claim that at this holiday the souls of the dead were supposed to move into the bodies of animals if they had been “sinful,” and that human sacrifice was practiced. The Celts did not believe in sin, nor in reincarnation or the transmigration of souls. The Celts also did not practice human sacrifice, with the exception of the execution of criminals, which we still practice in America today.
Halloween in America is now a completely secular holiday. Though it still maintains some of its harvest festival roots, there is no longer any religious or spiritual significance to the practices of bobbing for apples, trick or treating, and dressing up in costume.
Samhain, however, is still observed by Wiccans and other Pagans for its spiritual significance in the Wheel of the Year, the cycle of holidays that mark transition points in the natural solar cycle.
[1] Because Samhain represented the transition between years, it could not belong to one year or the next. Since time did not technically exist during this period, other societal rules were suspended as well, creating the necessary atmosphere to allow people to vent frustrations, often by playing practical jokes on each other. This may be the precursor to the pranks practiced at Halloween today.
[2] A lot of the associations of Halloween, from black cats to dressing up in costumes, to witches, are more associated with Germanic tradition and Walpurgisnacht, which is associated with May Day, rather than the Celtic tradition or Samhain.
[3] A couple of sources list Gwynn ap Nudd as a British god of the dead, and Arawn as a Welsh god