Is there a Bible scripture that references Halloween?

No. You won't find any scripture in The Bible to reference Halloween. It's not Christian. It's roots can be traced back to a pagan origin and the pre-Christian Egyptians, Greeks and Romans, where they celebrated a festival for the dead.

The Druids worshiped Samhain, lord of the dead, as well as a sun-god . On November 1, which was also their New Year, they held a festival in honor of these gods. It was believed that the souls of those who had died the previous year were confined to the bodies of lower animals, and at the time of this festival Samhain assembled them together, and they were released to go to the Druid heaven. On the eve of the feast of Samhain the pagan Celts used to keep bonfires burning, believing that this would protect them from these evil spirits.

The many features of TODAY'S Halloween and Day of the Dead celebrations can be traced directly back to it's pagan roots. The ancients associated this time of the year with the supernatural and with the gathering of dead spirits, so Christendom's Churches adopted the pagan holiday, combining it with their All Hallows Eve/All Saint's Day, to supposedly honor the dead saints. People were thus encouraged to keep their pagan customs and beliefs and still celebrate what are called ''Christian' festivals. After the Reformation, Protestants rejected Halloween, but the pagan customs continued to flourish.

The only reference you'd see in the Bible would be in principle, where God is very clear about NOT mixing Christian with pagan customs when he says: :

"You must not walk in the statutes of the nations." "Do not learn the way of the nations at all." (Leviticus. 20:23; Jeremiah 10:2)

"What fellowship do righteousness and lawlessness have? Or what sharing does light have with darkness? 15 Further, what harmony is there between Christ and Be′li·al?…get out from among them and quit touching the unclean thing." (2Corinthians 6:14&15, 17)

"I say that the things which the nations sacrifice they sacrifice to demons, and not to God; and I do not want YOU to become sharers with the demons. 21 YOU cannot be drinking the cup of the LORD and the cup of demons; YOU cannot be partaking of "the table of GOD" and the table of demons. (1Corinthians 10:20&21)

At Acts 10:26 and Revelation 19:10 Christians are told never to bow down to or give undo honor to men or angels.

Further to the above answer

Further to the above, modern day Halloween 'festivities' basically honour all that is evil, ghoulish, sinister and macabre and therefore have absolutely no place in Christian worship or lifestyle.

Many people in the UK are confused by the popularity that Halloween has in the USA - a country that professes to be Christian - and the number of normally rational and Christian (presumably) people who see no wrong in it. Yet they, as Christians, are happy to dress their own offspring up in anything that is horrific, ghoulish or evil, subliminally teaching them to accept that evil is somehow 'fun', they teach them legalised blackmail in 'trick or treating' and then wonder why their children grow up having very confused ideas over what is good and wholesome and what is bad and evil.

Sadly the UK has followed suit in recent years in making more of Halloween, and trick or treating is becoming more common despite concerns of the elderly and vulnerable who invariably find this night scary wondering what will come through their letter box next in the name of a 'trick'. Even more sadly the companies that manufacture the paraphernalia of Halloween such as costumes and so on want to encourage it as they make millions every year out of gullible families who fall into this trap rather than make a firm stand against it.

In most Christian's opinions in the UK, Halloween is a pagan festival of the past, and the past is where it should remain.