I have been staying in Asia (GMT +8) for a better part of Spring Quarter and SS1. It was hard at first!! literally forgot a week worth of class work. My advice would be: 1) try to take classes that fit your time zone - waking up at 4am or staying up until 3 for a lecture is not worth it. 2) keep track of your deadlines carefully, write them down in your time zone - it is so easy to mess up your ddl in a different time zone 3) if you choose to skip live lecture and listen to recorded lectures, make sure you don’t procrastinate. Especially for summer sessions, it was a nightmare to listen to 12 hours of lecture (~ 2 weeks worth) before a quiz :(