HEY HARSH!

You must choose the time to study according to your requirements. If you can focus well at night, then you should study at night as it is quite silent at night. If you can wake up early in the morning, that's the best to opt for. Its said that a person can concentrate much better early in morning. Its upto you, what time to choose. Some prefer to study at night because they are not sure of themselves , that they will wake up early in the morning or not. Keeping your abilities and schedule in mind, you should opt for it. I hope this helps you.