Drawing on 25 in-depth interviews with parents employed in the service sector in the San Francisco Bay area, we find that meeting the demands of work and parenting almost invariably involved reliance on informal child care. We unpack the relationship between work schedules and specific constellations of informal child care. We show that the stability and predictability of work schedules shaped child-care arrangements. Working parents with stable, although frequently nonstandard, schedules often managed child care using a tag team parenting approach. Those with unstable schedules often engaged in a child-care scramble, in which care arrangements were pieced together on an ad hoc basis. Some parents with unstable work schedules avoided child-care instability by relying heavily on one family anchor who could consistently provide child care. On-call family support can sometimes buffer against the instability created by unstable and unpredictable work schedules, but instability in work schedules often reproduces instability at home. (author abstract)