Yes, “Samhain” was a Celtic pagan festival. (I’m Irish, too.) It’s connection with Hallowe’en is tenuous, now, but still there, mainly in the Jack o’Lanterns and bonfires.
http://www.youtube.com/watch?v=zQjrsCWhOqY
There is nothing Happy about Halloween. Many babies and children will be sacrificed in rituals. Just ask the police departments or do a google search.
The choice is God or Satan. . . there are too many fence sitting pastors and church members regarding this “holiday?”.