The Friday File: The percentage of US adults planning to wear a Halloween costume this year is 25%, down from 31% last year. By generation, 46% of Gen Z’ers will dress up, compared to 50% last year. Among Millennials, 43% will get outfitted, down from 50% in 2019. For Gen X’ers, 23% will be outfitted, down from 32%, among Boomers, 8% will sport Halloween attire, down from 12% in 2019!