In June 2017, the Council of the District of Columbia enacted the Child Care Study Act of 2017 to mandate a study of nontraditional-hour child care need and supply. The act defines nontraditional hours as any hours outside 7 a.m. to 6 p.m., Monday through Friday, or on a 24-hour basis. The Urban Institute was contracted by DC Child Care Connections, Washington, DC's child care resource and referral agency, to conduct a study funded by the Office of the State Superintendent of Education (OSSE) and (pending the findings of the study) provide recommendations for expanding the number of child development facilities with nontraditional hours and incentivizing more child development facilities to offer nontraditional hours. This effort aligns with Mayor Muriel Bowser's priority to increase the availability, affordability, and quality of child care in the District. (author abstract)