- September 16, 2021
- All Day
National Stepfamily Day is celebrated annually on Sept 16. This day is designated as a time for step families to spend time together and for children to honor their stepparents. The first National Stepfamily Day was founded by Christy Borgeld in 1997. The holiday was created in order to give step families a day to celebrate a strong family structure, give recognition to individual family members and instill a sense of responsibility in all extended family members.