This just came across my radar this morning.
I have no idea if there were events or anything involved. I'm not interested in the drama surrounding which version of D&D is better or if retro clones are better etc.
I just like to remember the good times I shared with friends playing games with Mr. Gygax's name on them.
If you care to share your reminiscences, please do. Or perhaps I will share a thing or two. You can see one such inspired art work from this post here.
Have a good one.