Maintenance

Critical patches are applied on the third Saturday of every month. Scheduled maintenance tasks can include software security updates, hardware upgrades, and other activities that require downtime.

You are notified of upcoming maintenance windows according to the following schedule:

7 days before the maintenance window
72 and 24 hours before the maintenance window
On the day of maintenance, before the start of maintenance at 0500 hours Eastern time
When maintenance is complete, a confirmation email is sent

Occasionally, maintenance might need to be performed outside the monthly maintenance window. For example, to apply a fix for a serious security vulnerability. In these situations, you are notified in advance and IBM tries to ensure that the work is scheduled to be done outside your regular business hours. It is possible that the work would be done during the work week.