Data Horror Escape Room

On the wall by Professor Hutseephluts’ desk hangs a noticeboard. Papers are pinned all over it in a confusion of printouts, flyers, pictures, reminders, and souvenirs from travels around the world.

There is a calendar on which the Professor has circled several dates and post-it notes scribbled in frantic handwriting are stuck around it. The post-it notes seem to relate to the circled dates:

Among the pinned sheets of paper containing familiar-looking details of faculty events, travel itineries, book lists and photos, there is a postcard that seems to have been pinned on the board slightly apart from everything else, and a strange sheet of paper printed with, what looks like, random letters and numbers. Perhaps it is a code!