Understanding the potential child care needs for parents who work early in the morning, evenings, nights, and weekends has become a growing concern for policymakers trying to make child care more accessible. Families working these nontraditional (NTH) schedules—defined here as anytime outside of 7:00 a.m. to 6:00 p.m. on weekdays—can face extra challenges finding child care, and the types of care they use are less supported by public funds (Adams et al. 2021a–c; Sandstrom 2018). Using data from the 2015-19 American Community Survey and 2016 Survey of Income and Program Participation, we estimated the potential demand for child care during these nontraditional hours (NTH). (author abstract)