Why we run on years.

Every December I watch good businesses give away margin to hit a number that only exists because of where somebody once cut the calendar. The year is how long it takes the earth to get around the sun. That's the whole basis. And every target, every budget, every review snaps to it, as if the orbit of a planet had an opinion about your hiring.

Nothing in a business actually takes a year.

A customer relationship runs on its own clock, which might be six weeks or three years depending on what you sell. A hire takes about ninety days to be useful and about eighteen months to be fully yours. Building something and finding out whether it worked takes as long as it takes. None of these are twelve months and none of them start in January.

So we take a set of processes with completely unrelated natural rhythms and we assess all of them against the same astronomical accident.

You can see what it does if you look at behaviour near the boundary.

Discounting in December to hit a number that only exists because of where somebody cut the calendar. Hires deferred to next year for reasons that wouldn't survive being said out loud. Budget spent in the last three weeks of a period so it isn't cut in the following one. A project called finished because the quarter ended rather than because it was. A salesperson who quietly stops selling on the twentieth, because a deal is worth more to them in January. Perfectly intelligent people making decisions they'd never otherwise make, because of a line.

None of that's about the business. It's about the boundary. And the boundary is arbitrary.

Now the case for it, which is better than I want it to be.

An arbitrary shared unit is still enormously useful. It lets a tax authority, a bank, a supplier, an employee, and an owner all mean the same thing by this year. Coordination doesn't require the unit to be meaningful. It requires everyone to use the same one. Metres are arbitrary too and bridges stand up.

And there's something to a period ending regardless of whether you're ready. It forces a stop. Without a boundary that arrives on its own, plenty of things would simply never be closed out, and I say that as someone who would happily leave everything open.

So I'm not proposing anyone abolish the year, which would be both impossible and annoying.

The distinction I've found useful is between using it to coordinate and using it to judge. Coordinate on the calendar, because everyone else is. Judge on the natural cycle of the thing being judged.

A retention effort gets judged on the customer’s cycle, whatever that is. A hire gets ninety days and then a year, because that's how people actually work. A price change gets judged on the two months after it, because that's when the leaving happens. None of those line up with December and none of them should be made to.

It's a small correction and it sounds like semantics. It isn't. The unit you judge on decides what you notice, and everything a business improves is downstream of what it notices.