Understanding Your Chronotype
Your chronotype is your body's natural inclination to sleep at a certain time. If you naturally feel energetic at midnight, studying complex math formulas at 5 AM is counterproductive. Your core body temperature and cortisol levels simply aren't optimized for cognitive load at that hour.
Aligning Tasks with Energy
Instead of fighting your biology, align your tasks to your energy peaks.
If you are an Early Bird, tackle your hardest, most analytical subjects (Physics, Data Interpretation) immediately at 6 AM. Use the afternoon slump for passive tasks like organizing notes.
If you are a Night Owl, sleep until 8 or 9 AM. Do your passive reading during the day, and unleash your Deep Work blocks between 10 PM and 2 AM when the world is quiet and your brain is firing on all cylinders.