When Is a Year Not a Year?

The Calendar and the Experience

A year is not a year. The calendar year is fixed - twelve months, 365 days, roughly 8,700 hours. But the experienced year is not fixed. Some years feel long and contain much. Others feel short and contain little. The calendar is uniform; experience is not.

This seems obvious when stated but its implications are underappreciated. If the calendar year is not a reliable unit of experienced time, then using it as the primary unit for planning, retrospective, and life accounting is a systematic source of distortion.

What Determines Density

The density of a year - how much experience it contains per calendar unit - seems to be determined by several factors.

Novelty. New experiences are processed more slowly and encode more richly than familiar ones. A first trip to a new country takes more cognitive effort than a tenth trip to the same country. The first year in a new role contains more raw experience than the fifth year in the same role, even if the objective work is similar.

Transition. Years that contain major transitions - changes in relationships, roles, locations, commitments - tend to encode more densely than years of stable continuation. The transitions require more processing, more updating of models, more formation of new habits and expectations.

Difficulty. Hard years, years of genuine struggle, encode densely even when they are not primarily novel or transitional. The density comes from the sustained engagement that difficulty requires.

Time Dilation and Compression

The relationship between calendar time and experienced time is non-linear. In high-density years, calendar time feels slow in the moment - each week contains much, each month feels full. In retrospect, high-density years feel long: looking back, there is a lot there.

In low-density years, the reverse holds. Calendar time passes quickly in the moment - weeks slide by without notable events. In retrospect, such years feel short: there is not much to look back at.

This creates a paradox: we often prefer the periods that, in retrospect, will feel shorter. The easy, comfortable, familiar year passes quickly and comfortably. The difficult, novel, challenging year drags but leaves more behind.

Using the Non-Linearity

Understanding this non-linearity has some practical use.

The first implication: if you want years to feel full when you look back at them, density is the variable to optimize rather than comfort. Novelty, transition, difficulty, genuine engagement - these produce density.

The second implication: calendar-based planning is a poor fit for actual experienced time. Goals set for "this year" are set against a fixed calendar unit that will feel quite different depending on what else is in it. Goals that depend on a certain amount of development, a certain amount of learning, a certain amount of genuine change, should be measured against those experiences rather than against the calendar.

The third implication is simpler: years that feel short in retrospect are worth examining. Short-feeling years may be low-density years - years where not much processing occurred, not much changed, not much accumulated. They are not necessarily bad years. But they are worth noticing.

The archive this site represents spans four years of sustained writing and thinking. Some of those years were denser than others. The ones that felt long, that contained the most genuine engagement with hard questions, turned out to contain the most that was worth keeping.