Social Pro Daily Halloween Was a Red-Hot Hot Topic on Facebook and Instagram in October Columbus Day and Indigenous Peoples Day were also strong holidays and events for the month Hot, hot Halloween AlexRaths/iStock By David Cohen November 14, 2017 Trick or treat: Halloween dominated Facebook IQ’s Hot Topics for both Facebook and Instagram in October. David Cohen david.cohen@adweek.com David Cohen is editor of Adweek's Social Pro Daily. Recommended articles