The light was changing, too.
At first, I noticed the obvious things. Sunset was arriving a little earlier, and the shadows were growing longer. But after enough evenings outside, I found myself paying attention to the interval just before civil twilight.
Before they cool, the colors intensify. The warm light becomes almost incandescent before it slowly begins to recede, holding the last remnants of sunlight for a few fleeting minutes.
That's the moment I found myself waiting for.
It never lasts long, and I can never say exactly when it ends, only that eventually the radiance gives way to rose, then violet, and finally indigo.
As the indigo deepens, it spreads from the sky to envelop everything beneath it. The clouds, the trees, even the spaces between them gradually belong to the same atmosphere. Around that same time, the first stars appear, and over the course of the summer I watch the familiar constellations slowly migrate toward the coming season's positions.
By then, it's difficult to point to the moment anything changed. The shift isn't dramatic. It isn't announced. It happens gradually enough that one evening feels almost identical to the last, until suddenly the season has moved on and the sky has become something different.
Looking back, Twilight's Indigo Breath didn't begin with one memorable evening. It grew out of returning to the same hour of the day, summer after summer.