Eye care - 20-20-20

Interviewer said, "I shall either ask you ten easy questions or one really difficult question. Think well before you make up your mind!"

The candidate thought for a while and said, "My choice is one really difficult question."

"Well, good luck to you, you have made your own choice!" said the interviewer.

Here is your question: "What comes first, Day or Night?"

The boy was jolted into reality as his admission depended on the correctness of the answer to that one question. He thought for a while and said, "Its DAY sir!"