To solve the “A Date to Remember” mystery in Indiana Jones and the Great Circle, follow these detailed steps:

### Step 1: Gather the Necessary Clues
1. **Enter the Restricted Area**: Find the Blackshirt Uniform disguise and equip it. This will allow you to access the restricted area in Belvedere Courtyard without being detected by the guards.
2. **Pick Up the Shipment Report**: Go to the southwest corner of the restricted area and pick up the Shipment Report from a desk in one of the tents. This will add the “A Date to Remember” mystery to your journal and provide the location of the tent in the Museum Wing’s garden where you will find the container.

### Step 2: Progress Gina’s Fieldwork Quest
1. **Unlock the Museum Wing**: Progress Gina’s Fieldwork quest, “A Nun In Trouble,” which will unlock the door to the Museum Wing for you.

### Step 3: Locate the Tent in the Museum Wing Garden
1. **Navigate to the Garden**: Once inside the Museum Wing, head to the garden area and find the tent in the southeast corner. Be cautious as there is a Blackshirt captain roaming around who can see through your disguise.

### Step 4: Gather Clues from the Desk and Drawer
1. **Desk Clues**: Inside the tent, you will find a desk with several clues.
– **Calendar Page**: This page marks October 20 as the arrival date of the shipment, which is a Wednesday.
– **Secret Delivery Letter**: This letter details that the shipment was sent on October 15 and mentions the DICE cryptic code. It also notes that the shipment arrived on a Wednesday, but this is incorrect. The correct arrival date is October 15, which is a Friday.
– **Code Lookup Table**: This table maps days of the week to numbers. It includes:
– Dom (Sunday)
– Lun (Monday)
– Mar (Tuesday)
– Mer (Wednesday)
– Gio (Thursday)
– Ven (Friday)
– Sab (Saturday).

### Step 5: Decipher the Code
1. **Identify the Correct Day**: The shipment was sent on October 15, which is a Friday (Ven in Italian). Using the Code Lookup Table, you need to match DICE to the day of the week (Friday).
2. **Decode DICE to Numbers**: Shift the circled numbers in ‘C’, ‘D’, ‘E’, and ‘I’ to the right, twice, into the Ven column (Friday). This will give you the correct combination code.
3. **Enter the Correct Code**: The correct combination code is 6380. Enter this code to unlock the shipment container.

### Step 6: Collect Rewards
1. **Unlock the Container**: Once you enter the correct code (6380), the container will unlock.
2. **Collect Items**: Inside the container, you will find:
– Vatican Medicine map guide
– 10 Lira
– Giovanni’s Letter.

### Step 7: Complete the Mystery
1. **Add to Journal**: Grabbing Giovanni’s Letter will complete the “A Date to Remember” mystery and earn you 100 Adventure Points.

By following these steps, you will successfully solve the “A Date to Remember” mystery in Indiana Jones and the Great Circle.