What is the engagement date? (dd-mm-yyyy)
Look here for the first hint

There are two different bakery shop menu’s and also two pictures of the champagne tower

Look here for the second hint

The coloured glasses are standing in the shape of a number

Look here for the third hint

Trough the bakery menu you can find the names of the pastries on the tables. Find out how many there are per sort.

Look here for the fourth hint

To find the engagement date you’ll need to make the sum. From top to bottom you can find a number in each row.