Late nights and Quarter life crisis

A couple of years back, it was often to have night vigils. Late night suppers and all...study marathons and even chats. It is funny that as a student, one thinks about life after exams, then when that finally comes, one reminisces about life of a student.
Nowadays however, it gets increasingly difficult to stay up late. Quarter life crisis. But time moves forward. So what next? When can one take the present, as a present?