Work with a due date is performed unevenly, with effort clustered near the end. That distribution, more than the total workload, sets how a week feels.
Effort concentrates near the boundary
A distant deadline competes poorly against anything immediate, so early days go to whatever is urgent now and the task waits.
As the date approaches, the task becomes the urgent thing, and the work that would have spread across a week is compressed into its final portion.
The total hours may be unchanged, but they are delivered at a density that leaves no slack for anything going wrong.
Compression removes the recovery gaps
A week with evenly distributed work contains ordinary pauses. A week with a compressed ending removes them exactly when demand is highest.
Sleep is usually the first thing borrowed against, because it is the largest discretionary block available and the borrowing is invisible to others.
The pattern repeats when deadlines are regular, so the recovery never fully occurs before the next cycle begins.
The anticipation phase is not free
The days before the concentrated effort are not restful either. An outstanding obligation occupies attention intermittently without producing progress.
That low-grade preoccupation is a real cost, and it is why a task hanging over a weekend can spoil the weekend without a single hour being worked.
Doing a small, definite piece early often reduces the preoccupation more than the size of the piece would suggest, because it converts an open question into a partly answered one.
Interim dates change the distribution
Deadlines set by others tend to be single and final. Deadlines a person sets for themselves are easy to move, which is why they exert little pull.
Interim points that someone else expects — a draft sent for comment, a scheduled review — behave more like real dates because moving them requires telling somebody.
This is the mechanism behind the effectiveness of shared checkpoints, and it has little to do with discipline.
Why the pattern survives being noticed
People routinely recognize the shape and repeat it, because the compressed version does usually get delivered, and delivery confirms the approach.
What the delivery hides is the cost paid elsewhere: the sleep, the postponed exercise, the weekend absorbed by anticipation.
Judged over a quarter rather than a week, a flatter distribution generally produces the same output with fewer of those transfers.