There's no single answer that applies to everyone. Whether night or morning study is better depends on your individual chronotype, learning style, and lifestyle.
Night owls may find studying at night more productive as they are naturally more alert and focused during those hours. Conversely, early birds might thrive with morning study sessions due to their inherent energy levels and mental clarity.
Ultimately, the best time to study is when you feel most energized, alert, and able to concentrate. Experiment with different study times to discover your optimal learning period.