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I read an experience letter which said

"So and so" person has worked from "date1" till "date2".

Is it okay? Or should it be like this?

"So and so" person has worked from "date1" to "date2".

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to is right, till is not. – Kris Apr 20 '12 at 11:03
@Kris ok thanks – heyanshukla Apr 20 '12 at 11:05
@Kris: Why is 'til' wrong? – Mitch Apr 20 '12 at 11:15
Indeed. till or until are both fine in that sentence. – Matt E. Эллен Apr 20 '12 at 11:17
Please chek online. And let us know what you found. – Kris Apr 20 '12 at 18:41
up vote 4 down vote accepted

Either construction is fine.

In my mind using to is preferable, but until or till are acceptable alternatives.

There are examples in literature:

God has worked from those beginnings until now
she has worked from ten o'clock at night until noon the next day
He has worked from four in the morning until late at night
has worked from 6 till now

Till and until are synonyms in this context. They mean "up to a specific point in time". I would say that they are more likely to be found with simple (clock) times, rather than dates, but are not incorrect to use with dates.

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"up to a specific point in time": source? – Kris Apr 20 '12 at 18:44
-1. till and until could mean the same. to#till. – Kris Apr 20 '12 at 18:48
I don't understand your second comment. For your first: definition of till – Matt E. Эллен Apr 20 '12 at 23:36

I would say that you can use both, but that in some cases there can be a very slight difference in meanings regarding whether date2 is included or not. I don't have any evidence to base this on and it may be my background as a programmer that makes me say this, but I would say that for the first example ("date1 until date2"), especially if there is an emphasis on the "until", it sounds as though something happened on date2 to exclude it from the interval, whereas it's included in the second example ("date1 to date2", i.e. "date1 up to and including date2").

Being Australian, I would consider "till" to be rather informal, but I believe that in American English it is perfectly acceptable as an alternative spelling to "until".

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+1. Your instinct is right. You should find and include some references, as well. – Kris Apr 20 '12 at 18:53

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