Here's how Halloween went from a day of demons and turnips to a festival of costumes and candy

ghost halloween boo scary trick or treat

Drew Angerer / Getty Images

Happy haunting!

• Halloween draws from both Celtic and Christian traditions.

• While it's always had a morbid, spooky vibe, the festivities have changed quite a lot over the centuries.
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Halloween is the spookiest night of the year.

It's also a boon to the retail industry. In the US, spending on costumes and candy may reach a record high this year, Business Insider reported.

And the Halloween fever isn't contained to the States, either. In fact, people around the world celebrate the holiday in many different ways.
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But where did all these strange practices come from? Turns out, a lot of these customs date back centuries. The holiday has changed over time, transforming from an ancient tradition to the flashy fright-fest we know and love today.

Let's take a look at the origins of some of our favorite Halloween traditions: