5

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?

2

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

Complete the assignment by next week
Complete the assignment by next year

since they are not specific times/dates.

People would normally say

Complete the assignment by the end of the week
Complete the assignment before next year

  • "By Thursday" means Thursday is ok? Or it has to be before Thursday (e.g., sometime in Wednesday)? – quibble Sep 5 '14 at 6:17
  • 1
    It depends on the scenario. For example, if you always have class on Thursday. It would mean to have it done by class on Thursday. Whereas if you are taking an internet class that doesn't have set time frames, it would mean to have it done by 11:59PM Thursday night. – CRABOLO Sep 5 '14 at 11:57

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