For Laroi, there is no clearly defined day or night. Sometimes he drives all night and sleeps all day; sometimes he sleeps all day and drives all night. One day a week, Sophie works late so she can meet with far-flung colleagues in real time. Now she has enough energy left at the end of the day to go grocery shopping and cook dinner. The time markers reflect the time of day when participants told an interviewer they would normally be doing the activity shown.

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