Fail Day 19's password. Which also means you can't be on Tyson's route.
And by the way, although, yeah, this is part of the update for the bad timeline, I have to say, now that I actually knew where the new content for it was, I'm almost as intrigued to see where the bad timeline's going to go as I have been for the good one. I will say though... The more I see Thanatos, the more I hate him. Stupid unhelpful little rat.