I am a nocturnal habitat

Yes i was a nocturnal habitat for the past two months....this happens once in six months everytime because my semester exams will start...the day college starts n till study holidays are declared will never touch the book at all...once study holidays begins will wipe out all the dusts from the books which were borrowed from library in the previous semester itself as if am reading daily....then will search for anna univ website for syllabus..open it freshly start from the very first chapter for the first time...since there will be a lots of distractions in the day time we will start after having dinner only..we i meant in the sense along with my friends..i always do combine studies...we will study dividing n allocating some portions to each person so that the concerned person has to read n tell the story....it goes throughout the nite and if i happen to see sunrise i will immediately go to bed n will get up at 6pm in the evening only..i hardly see sunrise and sunset...atleast during study holidays il go to sleep at 6 in the morning but if exams starts il never sleep ,study throughout the nite,write exam,come home have my lunch n then go to bed around 2pm n then will get up next day morning only....now am perfectly alright because this habit will lead to ulcer problems...