When a sin is committed by a few people, and it has not yet spread in the society, it is better to avoid discussing that sin. The only thing to be done at that time is to personally discourage those who are indulging in that sin. In such cases it is said-

أَمِيْتُوْا الْبَاطلَ بِالْسُّكُوْتِ عَنْهُ.

Eliminate falsehood through neglecting it.

Based on that principle, ulama refrain from discussing certain sins to prevent the spread of unjust ideas, as some wicked individuals may seek to propagate falsehoods through the criticism of ulama. In such cases, the avoidance of discussing these issues is seen as a means to counteract the potential spread of falsehoods.

Halloween festival was a very unusual sin in Bangladesh. Very few people knew about it. But due to the widespread use of social media, pagan and satanic festivals like Halloween are about to become common in our society. Some luxury hotels in the country are organizing this type of anti-religious and anti-social festivals. I saw the interview of some Muslim youths who attend that event. None of them could tell anything about the history of it. 

I was shocked to see these things in my country. In the meantime, it was widely reported in the media that Halloween was also celebrated in Saudi Arabia. Saudi Arabia's anti-Islamic activities are not like other countries. When any anti-Islamic activities occur in Saudi Arabia, Secular people in our country get opportunity to laugh at religious Muslims.

However, danger is at the door. So we need to be aware of the danger to deal with it. To refrain from such pagan acts, we have to make everyone aware. According to Encyclopedia Britannica, Halloween is a holiday observed on October 31. Halloween had its origins in the festival of Samhain among the Celts of ancient Britain and Ireland. On the day corresponding to November 1 on contemporary calendars, the New Year was believed to begin. That date was considered the beginning of the winter period, the date on which the herds were returned from pasture and land tenures were renewed. During the Samhain festival the souls of those who had died were believed to return to visit their homes, and those who had died during the year were believed to journey to the otherworld. People set bonfires on hilltops for relighting their hearth fires for the winter and to frighten away evil spirits, and they sometimes wore masks and other disguises to avoid being recognized by the ghosts thought to be present. It was in those ways that beings such as witches, hobgoblins, fairies, and demons came to be associated with the day. The period was also thought to be favorable for divination on matters such as marriage, health, and death. When the Romans conquered the Celts in the 1st century CE, they added their own festivals of Feralia, commemorating the passing of the dead, and of Pomona, the goddess of the harvest.

In the 7th century CE Pope Boniface IV established All Saints’ Day, originally on May 13, and in the following century, perhaps in an effort to supplant the pagan holiday with a Christian observance, it was moved to November 1. The evening before All Saints’ Day became a holy, or hallowed, eve and thus Halloween. By the end of the middle Ages, the secular and the sacred days had merged. The Reformation essentially put an end to the religious holiday among Protestants, although in Britain especially Halloween continued to be celebrated as a secular holiday. Along with other festivities, the celebration of Halloween was largely forbidden among the early American colonists, although in the 1800s there developed festivals that marked the harvest and incorporated elements of Halloween. When large numbers of immigrants, including the Irish, went to the United States beginning in the mid 19th century, they took their Halloween customs with them, and in the 20th century Halloween became one of the principal U.S. holidays, particularly among children.

As a secular holiday, Halloween has come to be associated with a number of activities. One is the practice of pulling usually harmless pranks. Celebrants wear masks and costumes for parties and for trick-or-treating, thought to have derived from the British practice of allowing the poor to beg for food, called “soul cakes.” Trick-or-treaters go from house to house with the threat that they will pull a trick if they do not receive a treat, usually candy. Halloween parties often include games such as bobbing for apples, perhaps derived from the Roman celebration of Pomona. Along with skeletons and black cats, the holiday has incorporated scary beings such as ghosts, witches, and vampires into the celebration. Another symbol is the jack-o’-lantern, a hollowed-out pumpkin, originally a turnip, carved into a demonic face and lit with a candle inside. Since the mid-20th century the United Nations Children’s Fund (UNICEF) has attempted to make the collection of money for its programs a part of Halloween.
Through this history we can see that the historical basis of this festival is the basis of paganism or Christianity. There is no opportunity for Muslims to organize this festival or participate in it under any other pretext.

Participating in these ceremonies makes us like a pagan or Christian nation. The Prophet sallallahu alaihi wa sallam has told us this principle:

مَن تَشَبَّه بقومٍ فهو منهم

Whoever adopts the similarity of a nation will be counted among them. -Sunan Abu Dawud, Hadith 4031

When the Prophet came to Madinah and saw the Companions celebrating the festivals of other nations, he said- Allah Ta'ala has given you two better festivals instead of these two - Eid-ul-Fitr and Eid-ul-Azha. -Sunan Abu Dawud, Hadith 1134

Islam teaches people to give, not to take. The Prophet sallallahu alaihi wa sallam said

اليدُ العُلْيَا خير من اليدِ السُّفْلَى.

The upper hand is better than the lower hand. -Sahih Muslim, Hadith 1033

Once the prophet sallallahu alaihi wa sallam while accepting the pledge of allegiance from the companions said- Do not ask people for anything. -Sahih Muslim, Hadith 1033

The Sahaba who participated in that pledge of allegiance fulfilled the pledge with the Prophet so sincerely that if one's whip falls from his hand after riding the horse, he would pick it up himself. He did not request anyone else to pick it up.

The teaching of Halloween is completely contrary to it. In the name of 'trick or treat', children are being made to be greedy for other's possessions. However, children are our future. What is instilled in their minds is reflected throughout their life. So they should be consciously kept away from such festivals.

Besides this, there are other anti-Sharia things in this festival. One of the beliefs of this festival is that the soul of the dead returns to the earth on this day where as there is no matter of soul returning in Islam.

A major part of this event is to frighten others. But the Prophet sallallahu alaihi wa sallam said:

لَا يَحِلُّ لِمُسْلِمٍ أَنْ يُرَوِّعَ مُسْلِمًا.

It is not permissible for one Muslim to threaten another Muslim. -Sunan Abu Dawud, Hadith 5004
Not only muslims, but some eastern and western churches also disliked the celebration of Halloween. Pope Francis said, 'What a bad day we have to see. Christians celebrate Halloween, the festival of Satan. What happened to our faith? We are spiritually dead. According to the Celts, it is the day of the god of the death-Samhain. This day the spirits come to visit the earth according to their belief.'

A writer on Christian.com said, "Because of participation in such satanic festivals, Europe also left Christianity like America."

According to the website of the Coptic Catholic Church in Alexandria, "Such festivals are based on folklore, which is sometimes humorous." But we must be careful about their nature, influence and purpose. This is being propagated by heretic who worship Satan and want to destroy religion and human values. So Halloween is one of the four feasts of Satan's worshippers.' - Al Jazeera.net 31 October 2021

Almost every convert Muslim regrets and says, why did I not come back from the path of Hell earlier? Why did I get the message of guidance so late? We have to be shocked seeing their regrets. Seeing Saudi Arabia celebrating Halloween, a person who converted to Islam 31 years ago said, 'Allahu Akbar! This is happening in Riyadh, Saudi Arabia! I threw these pagan festivals away 31 years ago when I embraced Islam. When I see some muslim celebrating pagan festivals I left behind, it annoys me very badly.

Another new Muslim sister said, 'How is it possible? Is it really in Saudi Arabia? Are they Muslims? I don't understand. It's terrible.'...

After such clear and emotional messages from convert muslims, what more can we say to Muslims who are celebrating this day?