Different understandings of "by"in English and Chinese When my teacher writes in his e-mail"...send me your homework by Friday" ,I get confused at a moment and come up with this question: Does "by Friday"mean till 00:00 on Friday?Or,till 24:00 on Friday including the day of Friday? Because as for me,a Chinese,I must prefer the later one,including the day of Friday.I wonder if there is any different understanding in other culture.