If you are a runner, the Nike + Human Race is a great event to do. It can be done anywhere in the world and at any time on the specific day. The next one is on Saturday, October 24th. Check out the Nike + site and join in. I know I will be checking it out. Although I can't run it due to a bad knee this time around, I will be sure to catch the next one.
If you do run it, let me know your time so I can congratulate you for a job well done!
Here is the link: Nike + Human Race - The Day the World Runs
Have a great run and a great weekend.