you can't train [a dog] to wake you up every day at a certain specific time, unless it can recognise some signal.
My dog always woke me up at a consistent time every morning. I didn't train her to do that, and I don't know what the signal was (other than the position of the sun, I guess). I used to hate it, because it was always too early, but I eventually got used to it.
Maybe I was the trainee, in this case 😆