Mac turns on always at 6 AM
Put iMac to sleep (screen saver) in the evening and the screen comes on always at 6 AM for about 20 sec and turns off. The last time I shut down the computer and it started by itself again at 6 AM
iMac 27″, macOS 15.3
Following the instructions in this Apple document, Schedule your Mac to turn on or off in Terminal - Apple Support, check to see if you Mac is scheduled to turn on at 6 am and then off. If it is correct it.