Time intervals
On the Add time interval page, you can define intervals of months, days of the month, days of the week, and hour ranges for silencing notifications. These intervals are used in route configuration.
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Intervals that span multiple contiguous time elements will be combined into ranges. You can use Shift to select. The “Select All” button selects all elements; pressing it again removes the selection. If no values are specified in the created configuration, then this is equivalent to selecting all values. For example, if you specified the days of the week, but did not select the months, then these days of the week will be selected equally in each month.