This article summarizes the Accreditation Council for Graduate Medical Education's proposed new regulations on housestaff duty hours. The recommendations are perhaps most notable for what they do not contain—a reduction in the 80-hour weekly limit. Rather than narrowly focusing on duty-hour restrictions, the recommendations take a broad approach to maximizing patient safety in training environments through targeted reductions in work hours for first-year residents, enhanced supervision by attending physicians, standardizing expectations around handoffs and signouts, and engaging residents in safety and quality improvement efforts. Although the current 80-hour work week will be preserved, the new regulations would eliminate extended-duration shifts for first-year residents (as was recommended in a 2008 Institute of Medicine report). The current regulations, implemented in 2003, have improved residents' quality of life but have not positively impacted patient safety or educational outcomes. The ACGME acknowledged this evidence in crafting recommendations that seek to establish a culture of safety within residency programs and focus more broadly on enhancing supervision for early-stage residents while allowing more autonomy for senior trainees.