In industrialized nations, patterns of behavior such as attending work or school are strongly predicted by the seven-day weekly calendar. The weekly cycle can be disrupted by unexpected events (e.g. familial death) or planned days off (e.g. vacation). Because the weekly cycle typically begins on Monday, people should expect others who experience disruption to re-enter the weekly cycle on Mondays in order to synchronize with the conventional weekly pattern. Study 1 examined expectations for returning to work after the death of a spouse, Study 2 examined expectations for returning to university classes after the death of a parent, and Study 3 examined preferences for Monday versus Friday holidays from work and from classes. All three studies showed an overwhelming expectation for returning to work or class on Mondays, and people explained this expectation by referencing time (e.g. it's time to get back to routine). Expectations of return times other than Monday were explained by referencing emotion (e.g. she's upset and can't think straight). Conceivably, expectations to synchronize behavior to the beginning phases of a cycle hold across daily, weekly, and annual cycles.