Keeping baby awake during day

How do you keep sleepy baby up? I’m pretty sure he has his nights/days mixed up and it’s been a never ending cycle...never sleeping at night (he sleeps on and off all hours of night and fusses) and sleeping all day. He wakes to eat but passes out at breast. I’ve done bath and it just makes him mad and then he’s back asleep after it’s done. I’ve done so much reading and it says to keep baby awake after feeding for 30-45 minutes at least but no longer as this can make baby overtired 😫