till / until

If you look up in any English dictionary you'll find that till is not an appropriate word in this context. The word "till" is an agricultural term, thus inappropriate here.

However, if you mean the word 'til, this is a an informal word or contraction. If you're speaking or writing informally or using the vernacular, you could use 'til. If you're speaking formal English, the correct usage is the word is until.

till 2 (tl)
prep.
Until.
conj.
Until.

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[Middle English, from Old English til, from Old Norse.]
Usage Note: Till and until are generally interchangeable in both writing and speech, though as the first word in a sentence until is usually preferred: Until you get that paper written, don't even think about going to the movies.·Till is actually the older word, with until having been formed by the addition to it of the prefix un-, meaning "up to." In the 18th century the spelling 'till became fashionable, as if till were a shortened form of until. Although 'till is now nonstandard, 'til is sometimes used in this way and is considered acceptable, though it is etymologically incorrect.

http://www.thefreedictionary.com/till

Re: till / until


My dictionary has "till" as a synonym for until. However, "till" seems entirely inapppropriate in your sample sentence. It's a very informal, conversational, almost colloquial approach to the language. I'd use "until" and in most cases--unless you're sure.

It's good to see you bright and alert, Roberta, and at midnight yet.

Flyboy, Midnight to me is just the beginning of prime time.