According to the University of Hong Kong’s summary of the research, the effect appeared among working and nonworking older adults, including retirees. Retirement removes one person from the workplace, but it does not remove that person from the social week surrounding it. The seven-day working week, by contrast, is largely a social structure. Some retirees genuinely miss their colleagues, their status or the sense of momentum that came with a working week. The feeling might involve anticipation, loss of structure, loneliness, an old habit of planning ahead or awareness that the surrounding world is beginning another working week without them.