Today is Homestuck Prom. In fall of last year was Homestuck Homecoming which is in the same vein. Basically, people get online tonight in some fancy dress if they want, could be cosplaying or not, and they take pictures and hang out with friends via tinychat or skype and stuff. Some people even go out out, like to a restoraunt, with a group of homestuck friends. Just something fun to do with other people you know. (you can even meet new people! :>)
Is there an official page for this somewhere or something?