Many people are preparing for the celebration of Halloween, which takes place at the end of the month in the tenth month. As a tradition in Ireland, Halloween, the day before All Saints Day, was seen as a period when the veil between this world from the next was at its thinnest.
Samhain is celebrated on November 1st (sow-en). It is the Celtic New Year, which marks the beginning of the darkest half of the calendar year in which we live.
Samhain is an Irish word that signifies "summer's end." Samhain was also known as the Feast of the Dead, Oiche na Sprideanna (Spirit Night), or the Night of the Dead since it was the night when the dead returned to the mortal realm.
After a long period of debate, the Catholic Church decided to name the first day of November All Saints Day - sometimes known as All Hallows.
As a result, All Hallows Eve became known as Hallowe'en.
As far as creepy Irish creatures go The Gray Man or Far Liath appears as fog and covers land and sea with his mantle is pretty creepy. He obscures rocks so ships crash upon them and darkens the road so that travelers unwittingly stumble over cliffs to their deaths. He is called Far Liath or Grey Man. Scary female spirits like the banshee aren't the only ones having all the fun.
Gray-Man Far Liath comes in like a fog and covers land and sea with his cloak. As he covers rocks on the shore, ships crash upon them. He will also fill roads with darkness, in order to have travelers fall over cliffs to their deaths.
The Dark Man or Far Dorocha travels on a black horse into our world to abduct humans that the Queen of the Good People desires. Although he never speaks, mortals invariably understand his commands and, unable to disobey, surrender their wills to his and mount up behind him.