ABSTRACT
Time-of-day has gradually appeared more and more in the research literature over the past 20 years, so that there is now a substantial body of research, as well as practical experience, that documents what is involved in working at different times of day. For example, human bodily functions are certainly affected by time of day. Human social activities are equally important for most people, and are also obviously geared to times of the day, and also to days of the week. The impact of time on work cannot be ignored.
