We know that our bodies suffer from overwork and lack of leisure: anxiety, mental-health issues - we're not designed to work more than about 40 hours a week. Our systems wear out and the quality of the work suffers. After 50 hours, it crashes and burns.

Now we have a gig economy where many people are holding down several jobs at once. The whole concept of a 40-hour week makes people under 30 laugh.

Sunday blues often hit because the weekend was only about shopping and chores. If you can clear up some of that domestic detritus on weeknights, you might reclaim some time for what matters. Maybe the laundry can wait until Monday.

We know that people who work without breaks get tired, introduce errors, get sick and miss out on life. Make no mistake: those staff room hammocks are designed to keep you in them on the weekend.

When we don't get that escape from our work selves, I think we feel its absence on a deep, almost primal level. Leisure is uncommodified, unoccupied time where we get to be truly free, so feeling bad about missing the weekend isn't just, "Damn, I didn't make it to the mall!" It's a profound loss.

Many white-collar workers are lucky enough to have creative-class jobs that are satisfying, which is great as long as you're still able to carve out true, work-free leisure at some point. But there's been a kind of sneaky reframing of work as play as the Silicon Valley model has been imported into other fields. Now you see adult offices that look like nursery schools, and staff paintball parties, work cultures that encourage the "We're a family here!" fantasy while preventing workers from going home at a reasonable hour to be with their actual families.

We can do a bit of blaming: the proliferation of devices means we're always at work, always on call, always available. Physically leaving the office isn't a declaration of being off work anymore; your office is in your bag or pocket.