How do you know if you're reading less than you used to?
There is a stack of books on the nightstand that used to move. Now it mostly does not. Ask yourself whether you actually read less than you used to and the honest answer is a shrug — not because the change did not happen, but because "read for a while before bed" was never the kind of thing that got filed away as a memory of its own. Nobody remembers Tuesday as the night they read eleven pages instead of forty. It just happened, or it did not, and a year of it happening less and less can pass without ever once feeling like news.
Reading was never one memory to lose
Memory keeps things that stood out — a book that changed how you thought about something, an author you tore through in a weekend, an ending that stayed with you for days. It is bad at keeping the ordinary instances of the habit that made those standout books possible in the first place: the fifteen minutes on the train, the chapter before sleep, the afternoon you picked a book up instead of your phone for no particular reason. None of that reads as an event while it is happening, so none of it gets stored as one. You can go from a life with a fair amount of reading in it to one with almost none, and the shift itself never becomes a memory, because it was never one day. It was a hundred small choices, each one a little easier to make than the last, each one indistinguishable from the one before it.
A finished-books count is not a timeline
The number people reach for instead — books finished this year, or last year — feels like evidence, but it answers a much narrower question than the one being asked. A yearly total tells you a sum, not a shape. It cannot tell you whether those books were spread evenly across twelve months or gulped in a single vacation with nothing before or after it. It says nothing about the books you started and quietly abandoned, which often outnumber the ones that made the list. And it says nothing about when the habit actually thinned out — whether it faded gradually over the year or dropped off a cliff the week a new show started or a new job began. A total is a score kept after the fact. It is not a record of the days themselves, and the days are where the actual answer lives.
Nobody decides to stop. Something else fills the gap
Almost no one sits down and chooses to read less. It arrives as a side effect of something else claiming the exact minutes reading used to occupy — a phone picked up "for a second" in the same waiting room, the same queue, the same ten minutes before sleep that used to belong to a book. Each swap is reasonable enough on its own that it never feels like a decision about reading specifically. That is exactly why the total can fall a great deal without anyone consciously choosing it: nobody weighed a book against a phone and picked the phone. The phone was simply already in hand at the moment the choice would have been made.
What a plain record actually shows
The only way to settle this honestly is to stop asking memory, which has nothing reliable to offer here, and start asking a record instead: a line whenever you notice you were reading, written whenever you happen to write it, with no goal attached and nothing to finish. A few weeks of that and the pattern tends to show itself without needing much interpretation — a stretch of entries with reading scattered through it on ordinary evenings, or a stretch with almost none, and the difference between the two is usually clearer laid out day by day than it ever was from memory alone. Put a month from a year ago next to a recent one and you are not comparing two impressions that have both already been softened by time. You are comparing what got written down before either month knew how the comparison would turn out.
TimeMap keeps that kind of record without asking you to decide in advance that reading is a habit worth watching. A line about what you were doing, given a colour, saved with whatever moment you happened to write it — nothing about it requires tracking pages or setting a target. The pattern becomes visible later anyway, once there are enough lines to lay two stretches of days side by side and actually look.
If the drift is real, it was never going to announce itself with a single bad night. It arrives one ordinary evening at a time, each one a little easier to skip than the last, until the stack on the nightstand simply stops moving and nobody can quite say when that started.