It happens before the calendar admits it. The heat is still here in the afternoons, the garden is still producing more than I can keep up with, and yet something in the light has shifted — longer shadows by four o'clock, a thinner gold on the wall behind the stove. Late summer is my favourite stretch of the year and it goes past faster than any other, mostly because we spend it looking ahead to the season after.
The evenings change first
You notice it at supper. A week ago you ate with the door open; now there's a moment around eight when somebody gets up and closes it without discussing it. That small unremarked gesture is the real start of autumn, and it arrives weeks before the leaves do. I've started paying attention to the evening it happens each year.
Don't rush the change
There's a temptation, the first cool morning, to go straight to soup and blankets and everything the season is going to be. Resist it a little. The tomatoes are still coming, the herbs are at their strongest right now, and there are a handful of warm evenings left that you'll want back in February. The season will arrive whether or not you hurry it along.
What I'm doing instead
Preserving, mostly — putting the last of the summer into jars so it turns up again in the middle of winter, which is the closest thing to time travel a kitchen offers. Airing the wool things. Bringing the reading chair back toward the stove by a foot or two. Small preparations, done slowly, so that when the weather does turn the house is already most of the way ready and I don't have to do it all in one cold week.
If you take one thing into September, make it this: go outside at about seven in the evening and stand there for a few minutes. That light doesn't last, it isn't coming back for another year, and it's free.