We have established, beyond doubt, that the celebration of Hallow'een is absolutely forbidden in Islam. It is HARAM. The question arises as to what to do on this night. Muslim parents must not send their kids out "trick-or-treating" on Hallow'een night.
Our children must be told why we do not celebrate Hallow'een. Most children are very receptive when taught with sincerity, and especially when shown in practice the joy of their own Islamic celebrations and traditions. In this regard, teach them about the two Islamic festivals of Eid. (Eid-ul-Fitr is fast approaching, and this is the perfect time to start preparing them for it.) It must also be mentioned that, even Muslims who stay home and give out treats to those who come to their door are still participating in this festival. In order to avoid this, leave the front lights off and do not open the door. Educate your neighbours about our Islamic teachings. Inform them in advance that Muslims do not participate in Hallow'een, and explain the reasons why. They will respect your wishes, and you will gain respect in the process.
"A person who calls another to guidance will be rewarded, as will the one who accepts the message." (Tirmidhi)
Finally, we must remember that we are fully accountable to Allaah for all of our actions and deeds. If, after knowing the Truth, we do not cease our un-Islamic practises, we risk the wrath of Allaah as He himself warned us in the Qur'an:
"Then let them beware who refuse the Messenger's order lest some trial befall them, or a grevious punishment be afflicted upon them!" (24:63).
This is a serious matter and not to be taken lightly. And Allaah knows best. May Allaah guide us, help us to stay on the right path, and save us from all deviations and innovations that will lead us into the fires of Hell.