Best hour for you as a student

The picture above present a student reading. I got to find out that every student have their best reading hour. This is the time when they comprehend a piece the more. Now my question is have you understood which time works most for you... As a student, outside your reading hour you find huge difficulty to understand texts even the tiniest of it. There are so many reading hours which one can get acquainted with: early morning, hot afternoon, cool evening or even mid night. Which one works best for you as a student?