When by + time is used in the following way,
Complete the assignment by 3pm today.
Complete the assignment by this Thursday.
Complete the assignment by next week.
Complete the assignment by next year.
what is the latest possible time to finish the assignment? Do they always follow the same logical rule?
Best Answer
You are correct. It just means to finish the assignment before that time.
A classic example of this is how their are two types of students: those who procrastinate and those who don't. Where the students who like to procrastinate will usually wait till the last minute/hour/day to get the assignment done and those students who like to get things done right away will likely have the assignment all the way done or almost completed soon after it was assigned.
So if a teacher says "You have until 3pm Monday September 8th to turn in the assignment", it means the same thing as "Turn in the assignment by 3pm Monday September 8th".
So it's just assumed that any assignment that is turned in later than that time will not be accepted by the teacher and the student will get a score of 0. However, depends on the teacher/circumstances/etc, but is besides the point.
Most people wouldn't say
since they are not specific times/dates.
People would normally say