Métro, Boulot, Dodo: Why Time Suddenly Speeds Up Once You Become an Adult in France

Introduction

There’s a French expression that captures something almost every working adult eventually feels: métro, boulot, dodo. Literally, “subway, work, sleep” — a rhyming shorthand for the repetitive cycle of adult daily life. I found myself thinking about this expression again recently while opening the first door of my advent calendar, a tradition I’ve never quite let go of even at 31, and realizing with a small jolt that Christmas was already twenty days away. Time, I keep noticing, moves differently once you’re an adult — and there’s a fairly clear reason why.

Milestones Give Childhood Its Shape

In France, as in most countries, childhood and early adulthood are structured by a long, predictable sequence of milestones: école maternelle (preschool) around age three, école primaire from six to eleven, collège (middle school) from eleven to fifteen, lycée (high school) from fifteen to eighteen, and for many, university after that. Along the way come other markers — the bac, France’s most commonly taken diploma at eighteen; the driving test; the legal age to drink.

Each of these stages comes with its own deadlines, exams, and a clear sense of progression — you always know roughly what’s coming next and when. That structure, paradoxically, keeps you aware of time passing, precisely because it’s constantly being marked and measured for you.

Then the Structure Disappears

Once you finish your studies and start working, that scaffolding vanishes almost entirely. There’s no more automatic next stage, no annual exam confirming you’ve progressed, no external deadline pushing you forward. You’re left with what might loosely be called “adult milestones” — getting married, having children, buying a home — but these are far less frequent, far less certain, and nowhere near as structured as the steady rhythm of school years.

This is, I think, the real mechanism behind métro, boulot, dodo: without external markers breaking up the calendar, days start to blur into each other. I started working at 24; today I’m 31, and somehow it feels like barely any time has passed, even though seven full years have gone by. The routine itself — commute, work, sleep, repeat — is what erases the sense of time moving at all.

The Double Edge of Time Passing Quickly

There’s a genuine tension here. On one hand, time moving quickly without visible markers can breed regret — the sense of having let years slip by without quite noticing. On the other, the same effect works in your favor when you’re building something steadily: five years into learning Japanese, I realized that a small, consistent daily habit had produced real, substantial progress — progress I’d barely noticed accumulating because the days themselves had gone by so fast.

That’s the useful flip side of métro-boulot-dodo: the same blur that erases unstructured time also means that a habit, repeated daily without much conscious effort, compounds faster than it feels like it should. Five years sounds like a long time in the abstract, but lived day to day, inside a routine, it goes by quickly — and if that routine includes a little French practice each day, the progress accumulates just as invisibly, and just as really, as the passing time itself.

What This Means in Practice

The uncomfortable version of this realization is regret: looking back and thinking “I should have started learning French years ago.” The useful version is simpler — since time is going to pass at the same speed regardless of what you do with it, the only real choice is whether you’re building something during that time or not.

This isn’t really about grand resolutions. It’s closer to what I try to apply to my own learning: start without overthinking it, build a small daily habit, and let the same fast-moving, blurry passage of adult time work in your favor instead of against it. If you’re reading this, there’s a good chance you’ve already started learning French — but the same logic applies to anything else you’ve been putting off: the time is going to pass either way.

Conclusion

Métro, boulot, dodo isn’t just a catchy rhyme — it names something real about how the loss of structure in adult life changes our relationship with time. The good news buried in that observation is that the same effect that makes years slip by unnoticed also makes small, consistent habits compound faster than they feel like they should. Time is going to pass at the same rate whether or not you use it. The only real variable is what you’re quietly building, a little each day, while it does.