A holiday calendar with the option to toggle on and off days and to turn on and off the use of the calendar that would automatically block all calendars from booking on holidays. The user needs the ability to decide whether to use it, but currently this can only be done by updating specific individual dates on the specific individual calendars. This is a fairly easy enhancement to put together, but the only way it can be done now takes about 50 steps since it's day and calendar specific.