This brief examines the “supply and demand” of child care when young children’s parents work nonstandard or unpredictable schedules. How many families need nonstandard- or irregular-hour child care, and why? How many child care providers supply nonstandard- or irregular-hour care, and what are the barriers to expanding this service? What strategies to address this growing challenge have been proposed or tested? The brief covers the national context with a focus on Philadelphia. Then it discusses strategies to address this growing challenge. The national context is covered, with a focus on Philadelphia. (author abstract)