Halloween is such a popular time of the year that, according to the "Mars Tricks, Treats, and Trends" report, Gen Z and Millennials have been known to buy their candy weeks before the big day arrives.

There is not only less chocolate candy for Halloween in stores, but it is also more expensive. Prices on seasonal chocolate candy have increased by as much as 7.5% from last year, Sadler said.

Of the generations, Gen X — adults born between 1965-1980 — is the most likely to eat candy corn during the Halloween season. 58% of Gen Xers told the National Confectioners Association in a ...