Concentration at night increases at night because of the calm and composed environment, no one will be there to disturb.
Studying at night helps you to manage your time more efficiently which is beneficial during exam time.
At night time there are fewer interruptions as compared to that of in the morning because social interactions and phone calls are done less in that time.
The low temperature creates a comfortable study environment which helps to focus more on work and study.
The person who is busy or engaged in some work in the morning or is not able to make time for their study in the daytime, this is a very good time for them to study.
Studying at night when everyone is sleeping is very calming and one will be able to study with more focus in a quiet atmosphere.
Doing work at night or studying at night enhances creativity which helps them to solve many hard problems.