Mulitple workmodes

Hello,

I've read it is not possible to schedule multiple work modes for systems (workcenter "technical administration" > "work mode management" in solution manager 7.1 SP12). So here's my question: what is the best practice in following example:

In our company:

Work mode "peak business hours" scheduled for all systems,weekly from Monday - Friday from 08:00 to 17:00

Work mode "non peak business hours" scheduled for all systems, weekly from Monday - Friday from 17:00 to 08:00 and Saturday and Sunday from 00:00 to 23:59

Now, if there is a "planned downtime" on Friday from 15:00 to Saturday 08:00 for all systems, what is the best way of planning this work mode "planned downtime" the simplest, fastest, easiest way?

a BIG thanks for any help!

Best regards,

Kenny