A calendar function would be great. So that you can choose the country and it will not alert on public holidays etc.
Example: Your monitoring is online on weekdays from 08:00-18:00h. It will alarm if there would have been a problem. On normal weekdays that is correct but not on public holidays because then you get an alarm and it will create an event (e.g. alarming for an oncall event which produces costs) although it is a public holiday.
So it would be great to have an option to choose a calendar with integrated public holiday function for your specific country to prevent such incidents.
You are able to import iCalendar files as time periods: Restricting actions to specific times of the day