There are lots of parameters to judge anything. For some it may be good, but for some it may be bad. If you are getting enough time in day to study than it is better not to waste your night time. But if there are distractions at daytime than you need to study at night. But the morning period is best to study. And also late night may lead to mental disorders, stomach problems later in life, acnes etc..
But there are lots of other benefits of late night study too. So, decide it by yourself.
Hope it helps