Extract from a message Christ gave to Luz de María on 10-27-2017. (edited)
My Beloved People:
I CALL YOU NOT TO PARTICIPATE IN HALLOWEEN.
Evil has possessed many persons, so avoid participating in satanic Halloween wearing costumes representing evil which facilitate demonic possession.
THE IGNORANCE OF MY PEOPLE IS SO GREAT, THAT GIVING IMPORTANCE TO THIS ACT THAT SEEMS INOFFENSIVE, IS IN FACT TO OPEN THE DOORS TO EVIL.
I do not want you to dress in religious apparel.
I wish you to pray the Holy Rosary.
I wish you to help your neighbor.
I wish you to feed the hungry.
I wish you to perform an act of mercy.
I wish you to be My Love and to join My Blessed Mother in the communion of Saints.