This brief is one of three that provides an assessment of the early impact of ExceleRate Illinois within the broader context of Illinois' child care supply. The brief focuses on changes in the supply of quality child care during non-traditional hours. It covers the period from 2011, before the Race to the Top- Early Learning Challenge grant, to 2016, the third year of the grant and last year of data available at the time of analysis. While child care for parents with nonstandard work or school schedules is frequently voiced as a concern in Illinois, the quality initiatives under Race to the Top in Illinois did not specifically target nonstandard hour care. Since we and our partner in the lllinois Bureau of Child Care and Development were interested in whether providers of nonstandard hour care took up quality supports, our policy question is whether spillovers of the quality initiatives of Race to the Top in Illinois affected the supply of high quality care during nonstandard hours. (author abstract)