Should I include activities done after the deadline?

So I’m participating in a hackathon that I have a decent chance of winning from November 3rd to 4th, which is after the Nov. 1 deadline. Is it a good idea to put this on my application to my two early schools?

Also, I’m part of the committee that is creating a hackathon that will take place after the January 5th deadline. Should I include this on my activities list, or not?