I also like the idea, however it just came through my mind that as far as i know FIAT doesn't have like fiat day or something like that. So why would us? Tho if we are going to take it further like business innovations then it might really be a good one. Or if the topic is all about the improvements using bitcoin as a medium
If ever, it will be the first currency to be commemorated.
Since there are just few bitcoiner per area, I think it should be done on a single area and all bitcoiners will go there, just like comicon. And OP will organize and finance it since it is his idea.
