I heard about this on Running from the Reaper podcast. Apparently every year on a weekend in October people from all over the world sign up and run either in an organized 5k, 10k, or half marathon or run a route of your own choosing on that Saturday or Sunday. All you need to do is record your results on their website. It’s basically a global fun run and way to feel connected to the universal running community. This year’s weekend happens to be the weekend of the annual Harpoon Octoberfest run that I do so I think I’ll be signing up for that. If you are interested in more info check out the website
www.worldwidefestivalofraces.com