The Equinox is at about 9pm (21h) tonight. That means goodbye to summer (hah!) and hello autumn. In reality it's been feeling like autumn for most of this month so we won't notice the change, except that for the next 6 months we will have more dark than light. Cheery thoughts...
In a month's time we will have this
and in two months this.
And then suddenly it will be February, we will have a week of sunny warm weather, and everyone will be saying "isn't it amazing, winter's over early".