Final answer:
Halloween is the second most commercially successful holiday, with substantial consumer spending on various festive commodities and events.
Step-by-step explanation:
Halloween is considered the second most commercially successful holiday, following closely behind Christmas. The celebration sees a significant amount of consumer spending on costumes, decorations, candy, and parties. The holiday's popularity, particularly in the United States, translates into substantial economic activity, as Halloween-themed retail merchandise and haunted attractions draw consumers to spend.