Answer:
Iโm where yesterday follows today. And tomorrowโs in the middle. What am I?
Die without me, never thank me. Walk right through me, never feel me. What am I?
I am black within and red without With four corners round about.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once Iโve told you all I cannot tell you more.
Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?
I always have to work with something in my eye. What am I?