In order to keep our SAP systems running healthy and secure regular patching and reboots are required. We perform this maintenance process once per quarter on these systems. The SAP administration team along with system administrators work very closely during this process to ensure the environment outage is kept to a minimum and also to ensure that all components are working correctly.
See the below matrix of our most common locations, showing the outage period in that time zone, a PDF document of the same is also included.