Biological Clock!!!
1 pm – 3 pm: peak time (highest capability for any activity)
9 am – 1 pm/3 pm – 6 pm (slightly reduced from peak time)
6 am – 9 am/6 pm – 10 pm (eat breakfast!!, light activities)
10 pm – 3 am (resting time: repairing time)
3 am – 6 am (resting time (avoid all actitivities)