October is Calendar.cx's second-busiest month with 214 national days and holidays. Halloween on October 31 is the month's centerpiece, with roots in the ancient Celtic festival of Samhain. But October has much more: National Taco Day (Oct 4), National Boyfriend Day (Oct 3), National Chocolate Day (Oct 28), National First Responders Day (Oct 28), Back to the Future Day (Oct 21), National Shawarma Day (Oct 15), and National Custodial Workers Recognition Day (Oct 2). World Mental Health Day is October 10. Columbus Day / Indigenous Peoples' Day falls on the second Monday. October's 214 holidays make it one of the richest months on the calendar.
