Hundreds of years ago, people were afraid of Halloween. They thought this because the sun would grow weaker and they thought the plants would die.
The Celts tribe had a god called Samhain, the god of Death. Celts lived over 2,000 years ago in Great Britain and Ireland. The Celts celebrated New Year's Eve on October 31st, but they called it "Samhain's Night." They called it this because they believed that Samhain came to Earth that night. As a gift to Samhain, they burned animals and wore animal heads and furs.
Years later, the Romans conquered the Celts. They had many gods. One god that was very important to them was Pomona, god of Fruit. They celebrated this god's day in the Fall, right after Samhain's Night. As a gift to Pomona, apples were given They were also given to the gods of rain and fire to thank them for not harming the crops.
Romans ruled the Celts for over 400 years. During that time, Pomona's and Samhain's festivals got mixed up and became one.
In the 1880's people came to the U.S. Many of those people came from Great Britain and Ireland where the Celts had lived. With them they brought three holidays. One of those holidays happened to be Halloween.