Registration information
here for QOC's meet, including the US Night and Ultralong Orienteering Championships. Starting October 1st, the cost for each race goes up by $7 ($3 for juniors).
Bumping this, my best information is the earlybird to standard pricing shift will occur automatically at 1am EDT (sorry, west coasters, Alaskans, Hawaiians and residents of other US territories in the Pacific). As of this writing, you've got six and a half hours for sure to get earlybird pricing; maybe seven and a half.