In November 2014, the Child Care and Development Block Grant (CCDBG) Act of 2014 was signed into law, reauthorizing the Child Care and Development Fund (CCDF)--the federal child care subsidy program--for the first time since 1996. In December 2015, the U.S. Office of Child Care issued a Notice of Proposed Rulemaking, which updated CCDF regulations in light of the CCDBG Act of 2014 and research that has been published since the passage of the original 1996 law. Included in the proposed rule are provisions to increase the supply and quality of child care during nontraditional hours. Nontraditional hours child care, often also referred to as nonstandard hours child care, has been defined as care provided outside of the standard working day, including during evening, overnight, and weekend hours. This Topic of Interest includes resources from the Research Connections collection on the supply of nonstandard hours child care, child care arrangements of parents working nonstandard hours, and access to child care subsidies of parents working nonstandard hours.