'Night' in the Bible

“Go, assemble all the Jews who are found in Susa, and fast for me; do not eat or drink for three days, night or day. I and my maidens also will fast in the same way. And thus I will go in to the king, which is not according to the law; and if I perish, I perish.”

During that night the king could not sleep so he gave an order to bring the book of records, the chronicles, and they were read before the king.