Why do you feel more tired now than you remember being last year?

Somewhere around the third yawn of the afternoon, the thought arrives on its own: I did not used to feel like this. Last year held roughly the same number of meetings, the same commute, probably a harder version of some of the same problems — and somehow it did not cost this much. The comparison feels certain. It is worth asking where that certainty is actually coming from, because it is almost never coming from evidence.

Memory keeps a summary, not a reading

You do not have a stored record of how tired you felt on a given Tuesday last April. Nobody does. What you have is a general impression of "last spring" built out of whichever handful of moments stayed vivid, plus a felt sense of how the period resolved. When you ask yourself how tired you were back then, your memory does not retrieve an answer — it constructs one, on the spot, out of whatever is easiest to reach. Energy level is one of the hardest things to reconstruct honestly, because unlike an event, it left almost nothing behind to reconstruct it from.

A finished stretch of time edits itself down

There is a second effect stacked on top of the first. A year that is over has already been shaped into a story, and stories compress. The three exhausted weeks in February get folded into "a rough patch," which reads as a single, bounded thing rather than twenty-one separate mornings of not wanting to get up. If the period ended reasonably well, the ending colours the memory of the effort it took to get there — you remember having gotten through it, and getting through it retroactively looks less costly than it felt at the time. None of that is dishonesty. It is just what happens to any period once it stops being lived and starts being recalled.

This year has not been edited yet

Meanwhile the tiredness you are comparing it against is not a memory at all — it is happening right now, unsorted and un-summarized, in full resolution. You feel every one of this week's short nights individually; you will only ever feel last year's as a blur with a label on it. That is not a fair fight. A raw, present, granular experience will reliably lose to a tidied, resolved, single-paragraph one, regardless of which year actually asked more of you.

What an actual record would show

This is exactly the kind of question a log can settle instead of argue about, if the entries exist to check. Not a mood score — the plain lines themselves. How many evenings mention an early night against how many mention staying up later than planned. How many weekend entries say nothing much happened against how many list somewhere you had to be. Whether words like "wiped out" or "exhausted" show up more often lately than they did across the same months last year. Reading real lines instead of trusting an impression gives you an answer either way, and either answer is worth having: if the record backs up the feeling, that is a real signal about sleep, workload, or something worth mentioning to a doctor, not something to wave away as being in a mood. If the record does not back it up, you have just saved yourself from treating a trick of memory as a fact about your life.

The comparison only works if both years were actually written down

The catch is that this does not work retroactively for a year you never logged. You cannot go back and check a feeling against nothing. What it does do is make the case for writing this year down, plainly, as it happens, so that next spring — when the same thought inevitably shows up again — there is something better to check it against than whatever your memory has decided to hand you.

TimeMap keeps that possible without asking you to measure anything: a line, a time, a category colour, put next to a different stretch of days when you want to compare them. Nothing about the comparison depends on how vividly you remember either period, which is the entire point — memory is precisely the part that is unreliable here.

You are probably not measuring a real decline when this thought arrives. You are comparing a fully digested year against a raw one, and the raw one will almost always look worse — right up until you have the lines to check.