Thursday certainly makes sense. Today should have been for the media to discuss the SOTU. Friday, being the end of the week, is a bad day for new material releases. The window for release was five days. Thus, Thursday works well.
I would think Thursday. I do think Trump wanted the 24 hour news cycle from the SOTU to play out. If you get into Friday, will be a lot of Super Bowl stuff over the weekend. It will come out.
Tomorrow is in 5hrs, EST.