July 30, 2025 12:36 AM (GMT+2) I tried a few dates that seemed somewhat marginally related to the drafting studio (such as the starting day seen in Calendar at drafting studio and the current day seen in The Great Hall Partitioning Plan), but they didn’t work. I have no clue what date could unlock this safe.

August 16, 2025 5:54 PM (GMT+2) After some hints by a friend, I managed to figure out the combination. It struck me as slightly arbitrary. The solution is to count the “small gates” (see Hidden meaning in the paintings message) in the Calendar at drafting studio. There are 8 gates. That represents the day. Now you just take the month in the calendar (November) and that’s the code: 1108.