This can be caused by direct balcony reservations, or for instance, for room maintenance. You can also define Rate Codes and Rules, for having prices higher/lower depending on the conditions.

Key Features:

• Users can enable or disabling rates by simple clicking on the section, they can also close/open the day by clicking on the day itself.
• Direct distribution (Basic) also shows the total number of rooms sold within each day and the rooms still available to sell
• If an event is available, it will be available in that day in the top of the window and if you move the mouse over the event it will display the name of the event and description
• Direct distribution (Basic) also shows Rack rate as well as other rates defined in the system(Early Price, Last minute, etc...) as well as their pricing information.
• At any given time the rate can be closed and/or opened by clicking the rate+day just like the Rack Rate