My cat, Ginger loves to get on both of our nerves. He loves to wake me up early to feed him and that is around from 2:00 to 5 ish. The time stamp depends on the day. I usually get up at 4:00 on school days. My sister is a complete night owl and won't go to bed until 2 ish in the morning and even then she might still be up. When Ginger is active which is early morning, my sister wants to sleep but Ginger wants to keep her up, so she leaves her door open so he can leave anytime he sees fit.