I would be great to have a bitcoin or cryptocurrency day but to be honest we don't deserve it yet IMO. We need a great user base as compared to that of fiat and something concrete activity or event such as government's legal status to cryptocurrencies. Such things really matters (see commerce graph on valentine day) so in the long run, it is really beneficial.
definitely,it would create curiosity among people who don't know about bitcoins to know about it.It must be organized world wide.But since there is no central authority for bitcoin,its difficult to organize.I don't think that it would be difficult if we decide to organize such day. We have a powerful community like bitcointalk and we have also sub forums for local meetups so if even if someone is willing to do such thing on local level, he can do so by announcing in the local forum section and probably creating a Facebook event.
It shouldn't be if you use Facebook event planner or similar. Add it to forums too and blogs and newsletters. Take pictures and announce plans. There events all I've the world for just about anything. Bitcoin should be easy.
