That thread exists because the FP+ window does not always open at 12am at 60 days. On days that the MK doesn't close until 1am, FP+ booking is not available until 1am. Disney doesn't post this anywhere, it's something that posters here figured out. Mesa created the thread and bumps it whenever MK 1am closing days are approaching, in the hopes that DISers who go into
MDE at 12 am and find the window not open will see that thread when they come to the DIS and realize that the booking window will open at 1am.