This is a shot of an unknown cosplayer at an unknown convention (anybody recognize those walls?) wearing Majora's Mask, with the moon hovering overhead. You know, I remember when Majora's Mask first came out my parents were concerned I was too stupid to grasp the time-changing aspect of the game. It turns out they were 100% correct. I was already in college, by the way.
Thanks to carey, who agrees somebody should start a Zeldacon and it should take place in a castle and we can all pretend it's Hyrule castle and have the time of our f***ing lives!