I wouldn't like to speak for the Trans-community, because I'm not part of it, but I can take my best guess (pending a correction from a passing Trans reader). I suspect many in the trans-community would prefer it was kept secret, on the down-low, or at least not made an integral part of the day. If you're doing your best to blend in, assimilating into society with a new affirmed identity, then joining this would immediately out you. I suspect some people would be open to it - but it would put many off competing. :o)