A year ago tonight — the solstice, as it happens — I started a small experiment. Every evening before bed I'd write down the date, the phase of the moon, and one true sentence about the day. Just one. Not a diary entry, not a gratitude list, nothing so grand. One honest line and the moon's shape, and then I'd put the pen down and go to sleep.
I want to be careful here, because there's a whole world of moon content that promises things I don't believe. I'm not going to tell you the moon controls your mood or that you should launch a business on a new moon. I don't track the moon because I think it's pulling my strings. I track it because it's a rhythm outside myself, one I didn't invent and can't argue with, and I've found that hanging my days on an external rhythm makes them easier to see. That's all. But that turned out to be quite a lot.
Why the moon and not a mood app
I tried the apps. They wanted me to rate my day out of ten, which I found strangely stressful — the whole enterprise of scoring an ordinary Tuesday. The moon asks nothing of me. It's just there, doing its slow arithmetic overhead, and all I have to do is look up and note where it is. The phase is a fact, not a judgement. Writing it down became a small nightly act of looking outward before I turned in, which, on the anxious days, was exactly the direction I needed to be pointed.
And one true sentence is a forgiving format. On full days it was, Walked to the reservoir and the swifts were back. On empty ones it was, Nothing happened and I let it. On bad ones, Cried on the phone to Mum, felt better after. One line is short enough that you can't lie to yourself much. There's no room for the story you'd rather tell.
What the year showed me
After twelve months I read the whole notebook back in one sitting, on a grey afternoon with a pot of tea. I wasn't expecting to find a pattern, and I want to be honest that what I found is probably as much about me as about the moon. But here's what I noticed:
- New moon. My quietest, most inward lines. Lots of tired, lots of early night. Over and over I'd written some version of didn't want to see anyone. I've stopped scheduling difficult things for these evenings, not because the moon forbids it but because past-me clearly struggled and I may as well listen to her.
- Waxing. The busiest, most outward-facing weeks. Plans made, letters written, the flat cleaned. If I was going to start something, I nearly always started it here without meaning to.
- Full moon. Sleep noticeably worse — I'll grant the sceptics that this might just be the extra light through my thin curtains. But also: my most vivid, most grateful sentences. Something in me seems to open up.
- Waning. The season of tidying and finishing. My lines here are full of small completions — finally returned the library books, cleared out the spice cupboard. Endings feel natural in the waning half.
I don't think the moon made me tired at the new moon. I think it gave me somewhere to put the noticing, so that a pattern I'd have otherwise missed had a chance to show itself.
The real gift
Here's what surprised me most. The value wasn't in the pattern at all. It was in the nightly pause. For one minute before sleep, every single day for a year, I stopped and asked myself what was actually true. Not what I posted, not what I'd tell a friend, not the tidied-up version — the true thing. Three hundred and sixty-five small moments of honesty, stacked up, turn out to change how you relate to your own life. You become a slightly more reliable narrator of yourself.
And there's a comfort I didn't anticipate in the sheer repetition of the moon. Every month it comes back around. Every new moon is a fresh dark start; every full moon, whatever mine has been like, will be followed by the slow letting-go of the waning. Nothing is the final state. The bad weeks are a phase in the plain, literal sense. On the hardest nights of the year, writing down that the moon was waning felt oddly like a promise: this too is on its way to somewhere else.
It's the solstice again tonight, the longest day, the moon a thin waxing crescent low in a sky that won't get properly dark. I've started a new notebook. Same rule. One true sentence, and the shape of the moon. I can't think of a cheaper or quieter practice, and I can't think of one that's given me more.