Halloween is the time to binge on scary movies, dress in whacky costumes and perhaps eat a lot of candy (no judgement here). But as Halloween gains feat and becomes more of a global phenomenon, Ireland is keen to bring the festival back home. Irish folklore traces the roots of Halloween to the Samhain festival that marked the turn of seasons, from summer to winter. It celebrated the end of the Celtic year, and honoured the dead who passed on to their next life.