Yes, penguins do have knees! A penguin’s leg is composed of a short femur, knee, tibia and fibula. The upper leg bones are not visible as they are covered in feathers, giving the penguin the illusion of short legs and no knees. No go the fuck to sleep.
"Oh I'll wake up and wash/blow dry/straighten my hair" . "I'll wake up early to shave my legs" . "If I go to bed now, I'll wake up early to finish this homework" . Alarm goes off: "Oh well, maybe I'll wake up early tomorrow to do it"