The page below is from the manual of PRTG, our quick-to-install and easy-to-use network monitoring software
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PRTG Manual: Scheduling
Using schedules, monitoring of certain objects can be paused for a certain time, for example, Sundays between 4 and 8 a.m. A paused sensor will not collect monitoring data, will not change its status, and will not trigger any notifications. With schedules you can limit the monitoring time automatically. You can also pause monitoring for planned system maintenance time spans to avoid false alarms. You can apply different schedules to every object. They are also used for reports and notifications.
Schedules are user account specific. To change the default pre-defined schedules or to add your own schedule, please see Account Settings—Schedules section.
Note: If you use failover clustering with nodes in different timezones, scheduling applies at the local time of each node. For more information, please see section Failover Cluster Configuration—Before Getting Started .