Halloween's origins trace back to the ancient Celtic festival of Samhain, which marked the end of summer for the Celts.

The Celts believed the boundary between the living and the dead blurred on the night before their new year.

Christianity later influenced the holiday, establishing All Saints' Day on November 1 and All Souls' Day on November 2.

When the holiday of Halloween is mentioned, thoughts of candy, costumes and scary movies may come to mind. But that hasn't always been the case for the spooky holiday.

There is a particular reason why Halloween takes place on the 31st of October every year, dating back to an ancient festival.

Here's how the holiday began.

Why do we celebrate Halloween on Oct. 31? When did it start?

According to History.com, Halloween is linked to the ancie

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