Using Wiim as a timer/alarm clock, triggering the whole system

You can buy relatively inexpensive "outlet" timers. I use one when on vacation to turn on and off at various times during the day and night lights and loud stereo.

I use an analog timer, but I am sure there are digital times if you need accuracy.

I should add that if you need a source that will play automatically you probably will need a CD player or FM tuner as input to the WIIM.  I don't think a WIIM will stream automatically on startup.

Thank you, Itmandella.

There is a wake-up/sleep timer function in the Wiim app that turns the Wiim on and plays whatever music service and playlist you pick. 

What I was looking for was something that turns on my receiver, when the Wiim turns on and plays.

With a regular timer, I could have my receiver turned on, and the Wiim at the same time, but that way (as you pointed out), the Wiim probably won‘t automatically stream/play. 

What I’m not sure about with the regular outlet timer method, is, if that would bypass the receiver’s built-in delayed power-on function (for protection), and if so, if that’s bad for the receiver. 

I just came across the Emotiva ET-3.
Not sure if that could do the trick? 
Can it do what I want? Can I use the Wiim’s timer/alarm to trigger the other receivers to turn on/off with this?