Is there any day of pegging awareness? It is sad to think that some people who might love it may never even discover it. I think there should be a day for it if there isn't already.
So it should be sometime in August. Perhaps the 15th or so? Enough time for people to explore other avenues of anal play before, but enough time afterward so they can come back for seconds (and thirds) if they like it and not be "outside the month".
I like the idea of a pegging holiday, and the comments above have some good ideas. I don't think it has to be a national event though. Why not just have it start as an EF event? Maybe a preadvertised sale on pegging 'supplies'. That would raise awareness and allow people to plan for it. Couples could make an occasion of it. If it catches on, so much the better.