I posted this on Academic and Career Guidance, but got 0 replies. So I'll repost it here and see if anyone can offer any help: I'm an engineering student in my first year. I find that I am most productive and and best able to concentrate at night. And not just at any time of night, but like around 11pm to 2am. While I suppose plenty of people here probably have the same preference, I find that this is actually counterproductive to my learning and studying habits. I am usually very sleepy in the morning, when most lectures are held, and only improve slightly in the afternoon, when both lectures and tutorials for me are conducted. I would like to maximise my learning and absorbency during these daytime hours, but this runs counter to my biological clock. I wonder if any of you have had any experience and success in rewiring your biological clock from night to day or vice versa? How could such possibly be done? And more importantly, how long does it take for your newly oriented biological clock to stabilise?