What: Sneaking around the Ministry
When: Monday, 15 December 1997
Where: The Ministry of Magic
OK, don't get nervous. Just act like you belong here and no one will be any the wiser.
Easier said than done when you're disguised as your own Dad and sneaking around his office trying to do stuff that was illegal even before this whole mess got started...
Ron took a deep breath and wiped his hands on his robes for what felt like the dozenth time that minute. He turned to look at Harry and Hermione, both of whom had Polyjuiced themselves into a pair of ordinary-looking employees. Harry's name badge read "Melvin Shuffleport, Department of Magical Law Enforcement, Filing Division", while Hermione's identified her as "Bernard Greenflower, Department of Experimental Herbology".
Taking a quick glance around to make sure the hallway was quite deserted, Ron spoke in a low whisper. "All right, looks like the coast is clear. So we'll make a beeline for the Department of Mysteries, and we all know where we're going from there, right?"
Though this is probably the furthest from a sane idea I've ever heard of in my life...