Well, all the evidence does point that Mana might be the 14th, but they haven't explicitly stated it, so you never know. But yeah, pretty much looks that way.
Funny chapter. I loved how all of the higher administration baked cakes for everyone. Pretty funny.
Curious as to what is going to happen to Allen. Lenalee looks freaked out again. And I also wonder how Cross is going to communicate with Allen and provide him words of advice...err...well, just make fun of him. Haha.