Samhain was known in Ireland as the "Lord of Darkness". The Druid religion was practiced by ancient Celtic tribes that populated Ireland and parts of Europe. This religion worshipped Samhain, the Lord of Darkness. Some writings also speak of Samhain as the "Lord of the Dead". But, scholars suggest that this is incorrect.
The Druid New Year began on November 1st. It is also known as the "Feast of Samhain". The Celts only recognized summer and winter seasons. Literally translated, Samhain means "Summer's End". At this time, the hours of nighttime were growing significantly over the hours of sunlight. Hence, Lord Samhain reigned over the long winter months as the influence of the Sun god and the summer season (Beltaine or Beltane) preceded. Samhain's influence grows with the increase in the hours of darkness, as he can only roam the earth during hours of darkness.
The Druids believed that on their New Year's Eve, all of the people who died in the past year would rise up and search for the passageway to the netherworld. On this night the passageway or "veil" between both worlds was it's thinnest. Lord Samhain would roam the earth in search of these souls to capture them and take them to his world of darkness. To this day, some people put lights in their windows to help the dead find their way, and keep Lord Samhain away from taking them.
The Druid religion, dating back to about 200BC, had priests and priestesses. These magicians (soothsayers or wizards) filled the most important roles in Celtic culture. At the time the Celtic tribes were close to nature. As a result, they worshipped many things in nature as their gods. But no Druid god was more powerful ,nor more feared, than Lord Samhain.
Some of the roots of Halloween are traced back to the Druid religion and Lord Samhain. Certainly, Halloween took aspects of darkness , black color, evil spirits, and people rising from the dead and roaming the earth on this night. These themes of Halloween are all common with this religion.
Pope Gregory II moved the christian holiday of "all Hollows Eve" from May 13 to November 1st to coincide with the Feast of Samhain. This was an effort by the catholic church to downplay the pagan festival. Hopefully, they reasoned, it would replace Samhain and the pagan celebration would fade away. The pagan festival continued to be celebrated, and Halloween evolved largely from it. Today, the Catholic church tolerates Halloween, recognizing it is a fun holiday and not intended to hold religious or other supernatural beliefs or religion
The answer is below noted.
there is no god named samhain ^_^
visit religious tolerance . org
The sad part is I have seen people on witchvox say it's true and talk about a non existent god named mula muck or something like that. People should check there sources.