This section can be accessed by clicking the "Blocked days" link in the "Manage" section of the menu. It is accessible only to administrators.
No user can create meetings in the dates that are blocked by the administrator.
The dates can be unblocked by checking the corresponding checkboxes on the left and choosing "Delete" from the bottom dropdown.
Adding a blocked date
To block out a day or a date interval click on the "Block date" button and choose the calendar date, or the interval that needs to be blocked as well as the location that will be blocked as a whole.