1. Select the "Configuration" option from the menu.
2. In the "Preferences" section:
a) enable the "Select if you want to configure booking restrictions" option;
b) select the "Closed on arrival" option;
c) and save settings.
3. In the "Set prices" window:
a) select a date;
b) set for which days you want to activate this restriction;
c) and save settings.
Related articles:
How to block an option to end a booking on a selected day?
How do restrictions work?
How to set (enable) the restrictions?