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I am always confused when I get an email stating "out of office until Thursday". Is the sender back on Thursday or still out of office (o.o.o.) on Thursday and only back on Friday? Is there a good reference that defines the meaning? Please do not tell me that it would be better to state "back on Thursday", since this does not answer the question.

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  • To me, 'until Thursday' means they'll be back in on Thursday. Sep 17 '14 at 14:32
  • This question is worded much better than the duplicate Apr 8 '16 at 14:03
  • @guanome I agree, that was second hit in Google search for "what it mean away until", also there is one more "duplicate" I found on SE Is “until” inclusive or exclusive?
    – Betlista
    Dec 4 '18 at 8:18
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Until x means that the change occurs on/at x:

I am here until Friday. | From Friday I will not be here.

or

I am playing football until 7pm. | At 7pm I finish playing football.

or

The store is closed until March. | In March the store opens.

In your example:

I am out of the office until Thursday. | From Thursday I am back in the office.

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