Though the weather was warm in Washington, DC, this past weekend, something was different. There was a chill in the morning and evenings were cut short by unexpected sunsets. It was clear that summer was tapering to its end; that the autumn was just around the corner. Maybe the summer temps have not eased back in your town, or maybe the first frost has already set in, but the fact remains: Summer ends today and tomorrow, the autumn begins.

Saying goodbye to summer is sad, but the coming of autumn, a time of harvest, is something to celebrate. So, whether you're reaping the bounty of your garden, putting the final stitches in your Halloween costume, or easing into the football season, we want to know how you are celebrating autumn this year.

From celebrations to chores, parties to vacations, we want you to share your green plans in the comments or on Twitter by using the #GreenFall hashtag. Don't forget to follow us @PlanetGreen.