A maintenance window is an interval time during which test executions are suspended. You may need to configure maintenance windows either at the account level or at the monitor level to prevent the collection of test data during a period where you know your applications will be unavailable. Maintenance windows may be recurring or one-time. Recurring maintenance windows occur once per week on a given day of the week, hour, and minute. One-time maintenance windows occur between a given start date-time and end date-time. Once the end date-time expires, a one-time maintenance window is of historical value only. It will never cause the suspension of testing again.