Data from two studies assessed the effects of nonstandard work schedules on perceived family well-being and daily stressors. Study 1, using a sample of employed, married adults aged 25 - 74 (n = 1,166) from the National Survey of Midlife in the United States, showed that night work was associated with perceptions of greater marital instability, negative family-work, and work-family spillover than weekend or daytime work. In Study 2, with a subsample of adults (n = 458) who participated in the National Study of Daily Experiences, weekend workers reported more daily work stressors than weekday workers. Several sociodemographic variables were tested as moderators. Both studies demonstrated that nonstandard work schedules place a strain on working, married adults at the global and daily level.