What are the odds?

What are the odds when I tell my manager that Monday is my last day (got a career job) that that will just tell me today is my last day.

I plan on telling them even with the small amount of days I'm working left i would like to do it as professionally as I can. My managera are cool people but strict as can be for management. Like they send you home if they see you talking to a co worker even if they don't know the context. Just seeing what your experiences are or if you have any idea of how aldi works with this! Thank you. Anyone can answer, asm, sm, full time or part time. Just trying to see what to expect