first-night effect
n.β Β«The rooms will be recreated at the athletesβ village in Turin, helping the Americans avoid what scientists call the “first-night effect,” which is similar to jetlag and can hinder performance.Β» ββU.S. Olympic Dreams May Rest on Softer Pillows” by Scott Soshnick Bloomberg.com Dec. 15, 2005. (source: Double-Tongued Dictionary)