Posted on: 21 March 2026
Sometime in late February, you begin to feel rather sure of yourself. You have spent months indoors, reading, thinking, constructing a reasonably coherent picture of how things are and where they are heading. The darkness helps. The mind does its best work when there is not enough light to remind you that the world outside has other ideas.
Then the 21st of March arrives.
It does not announce itself. It advances with a patience that borders on insolence: a few more minutes of light each day, the sun entering at a slightly different angle each morning, like a guest who knows perfectly well they are expected but sees no reason to hurry. And then, without drama, you notice that the maps you drew in winter no longer match the territory.
This is the equinox. The day when light and dark are exactly equal, after which light takes the upper hand for six months. Astronomically, it is a moment of unstable equilibrium: the system is perfectly balanced, and any perturbation tips it one way. Humanly, it is something quieter and less celebrated: the moment when the world resumes producing evidence you had not accounted for.
I mean small things. The way March light at seven in the evening makes your resolution to go to bed early look faintly absurd. The return of an appetite you had not scheduled. A conversation with someone you have not seen since autumn, who hands back a version of yourself slightly different from the one you had filed away. Nothing dramatic. Just the territory updating itself while your maps remain where you left them.
Karl Popper had a simple and inconvenient idea: you do not learn anything until you are proved wrong. Knowledge does not grow by accumulating confirmations; it grows by eliminating errors. Every time one of your hypotheses survives contact with reality, you have not demonstrated it is correct. You have only established that it has not yet been falsified. It is a distinction that changes everything, and spring enacts it reliably, every year, whether you are ready or not.
The season does not ask you to pass a test. It simply generates new data without consulting your preferences. The body responds first: the rhythm of sleep shifts, appetite changes, the threshold of attention moves. The mind catches up a few weeks later. Or it does not, in which case you have a specific kind of problem: you are defending a map against the territory rather than revising the map.
We live in an era that has turned spring into a season of intentions. Detox programmes, fresh starts, reinvention. An entire industry has been constructed around the notion that a change of season is an opportunity to begin from scratch, as though identity were a hard drive that can be reformatted twice a year. The problem is not that the idea is wrong. The problem is that it is beside the point. Spring does not ask you to begin again. It asks you to reckon with who you were while it was dark.
Those reckonings are rarely as momentous as we imagine. They tend to be quiet affairs. A project that felt urgent in January and now, in different light, merely feels effortful. A worry that had occupied considerable mental space and that the March sun has rendered suddenly small. A habit you justified with the cold, which now lacks that excuse. Nothing cathartic. Just the real adjusting itself and asking you to keep pace.
There is a Japanese phrase, mono no aware, that describes the bittersweet awareness of impermanence. The cherry blossoms that last a fortnight. The particular quality of October light that will not return for another year. The version of yourself from three years ago, gone without formal notice. It is not sadness, exactly. It is something more precise: the heightened attention that arrives when you know that what you are looking at will not last.
The equinox has this quality. Not because spring is fragile, but because its arrival is exact: you know when it began, you know it will run for six months, you know the dark will return. That precision changes how you look at the light. You do not take it for granted the way you do in summer, nor wait for it anxiously the way you do in February. You simply see it.
Seeing what you are living through, rather than cataloguing it or projecting it forward, is harder than it sounds. The mind is built to recognise patterns and extrapolate them into the future; it is not naturally inclined to stay with a specific quality of light on a specific wall on a specific afternoon in March. And yet that is precisely where almost everything that matters actually happens. Not in the plans, not in the maps: in the territory, as you move through it.
The 21st of March is not a starting date. It is a verification date. An annual reminder that the world continues producing evidence regardless of your theories, and that the most intelligent response is not to resist that production but to meet it with the curiosity of someone who knows they are probably wrong about something.
Every year, spring dismantles something I thought I had settled. Every year it is a different thing. Sometimes a conviction about myself, sometimes an assumption about work, sometimes simply a habit that dissolves like snow in March without any effort on my part. That is not disappointing. It is exactly how the whole thing is supposed to work.
You are always wrong about something. Spring shows you what.