It is currently available for timeshifting if you aren’t going to be able to see it live. (Remember: you must timeshift at least an hour before if you don’t have a premium accouont.) It takes place on 1/25 at 19:00 Japan time, which converts out to 5:00am Eastern the same day and the stream itself will begin three minutes prior.
I will likely be watching it and live tweeting announcements made through this event. Please see below for the Nico Live page.