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Today is Tuesday of week 1.
I have just been told to do X until next week.

When is the last day I can do X?
Sunday of week 1? Sunday of week 2?

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You mean you have until next week to do X, right? – nohat Feb 15 '11 at 8:09
@nohat here is the full sentence (neither of us are native speakers by the way): "But it's ok if you let me know the name until next week." – Nicolas Raoul Feb 15 '11 at 9:10
in that context the word "until" is wrong. I expect that what's intended is "before", and if the context is work-related then any time before 09:00 on Monday of week 2 should be fine. – Peter Taylor Feb 15 '11 at 10:31
up vote 1 down vote accepted

According to Wiktionary, Until basically means:

Upto the time of (something happening)

Hence, accordingly, until next week means, before next week begins, i.e., the Sunday of Week1.

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Yes, I guess that's what she meant. – Nicolas Raoul Feb 15 '11 at 11:08

There are several problems with the question.

Do X until next week.

This means carry on doing some continuous work named X from now to [some unspecified day and time in] next week. Then stop doing X [forever or until instructed otherwise]

Let me know the name until next week

Means let me know the name every time necessary from now to [some unspecified day and time in] next week. After that, don't let me know the name.

This is an unusual construction and might be used if the requester is forgetful or if the name changes many times each work - for example if it is the name of the winner of the daily crossword and the requester has to do something with that name every day (print in tomorrows newsletter, send prize ...) but will not be doing it next week (vacation?).

let me know the name next week

Means I don't need the name now, but I will need it next week [probably any day and time in that week]

let me know the name before next week

Means I can wait but I need it sometime between now and the start of next week.

There is inherent ambiguity about the start of a week and the point in the week that would be acceptable when you ask that something be done "next week", you should expect rising anxiety in both parties as the week progresses.

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+1 interesting! – Nicolas Raoul Feb 15 '11 at 11:07

I would interpret it like this:

Sometime unspecified time during week 2, you'll be taken off of X and put on a different task.

However, many non-native English speakers confuse the words until and by and say something like this when they really mean they want you to finish a project by a certain time.

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Actually, X = decide what friend I will bring to an event next month (so that she puts our names on the guest list). It is not something that takes time. – Nicolas Raoul Feb 15 '11 at 7:57
Then the sentence doesn't make any sense ... unless the speaker intended by, in which case I'd say do before the week is over. – awm Feb 15 '11 at 8:02

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