National Stepfamily Day is observed in the United States every September 16. This day celebrates stepfamilies and acknowledges the diverse structures of modern families, which often include children from previous relationships. The holiday was initiated in 1997 by Christy Borgeld, who aimed to support and unite stepfamilies, addressing the lack of resources available to new stepparents at that time. Stepfamilies can be categorized as "simple," where only one spouse has children from prior relationships, or "complex" or "blended," where both partners have children from previous marriages. The day serves as a reminder that creating a blended family requires time, patience, and effort, particularly in navigating challenges related to parenting and family dynamics.