I live in the U.S. for over 25 yrs, still work in the middle of night 7 days a week.

the issue is it doesn't matter where I am in asia or US, I always found myself working in the middle of night...

Nocturnality?

armandch: to be serious, YES! I am always sleepy during the day since I was young. I am energized pass 11:00 PM...

but this plurk has nothing to do with my habit. I am complaining my job here