This paper examines the child care arrangements of mothers who work evenings, nights, or irregular schedules rather than regular daytime hours. Low-income working mothers in nonstandard schedules show greater use of any type of child care than low–income standard-schedule mothers and are more likely to use multiple child care arrangements. Partners are important sources of child care for mothers working nonstandard hours, and single parents rely on other relatives for child care at high rates. Nonstandard-schedule workers need not only child care at irregular hours but also more-flexible daytime care.