EP 8 hints in recent packs

Found it! It’s the Scuba Pro Emporium Shelf Unit and the calendar on the side shows a bluish landscape with a plain and mountains (?), with underneath 4 rows of 7 days. The 9th day has blue stripes, the 11th and 12th are marked with red crosses and the 26th day, so two days before the end of the calendar, is marked with a yellow circle.