Schedule maintenance

Times shown in UTC (UTC+00:00).

What is happening?
The title is what customers read on the status page and in the announcement.
Title

Message to customers
When?
At the start the affected components switch to Under maintenance. At the end they go back, unless someone changed them in between.

Starts

Ends
Who hears about it, and when?
Confirmed subscribers get one email, and destinations that chose Maintenance get the same moment. Only when subscriptions are on and the page is published.
Announce