The "Opening hours" section of the restaurant account is designed so the account holder could set different schedules for delivery, pickup, table reservation, dine-in services or to disable/pause services on exceptional occasions, such as special holiday opening hours.
In order to set up the restaurant opening hours, go to Setup -> Services & opening hours -> Opening Hours -> Add hours, like this:
Please note that the order-taking app must be connected at all times during the sum of all restaurant hours of operation that the restaurant sets up in this section.