Earliest newspaper uses via Google News archive:
- prepone: Trenor, John J.D. (Dec 5, 1913). Prepone. The New York Times (New York). Accessed from http://query.nytimes.com/mem/archive-free/pdf?_r=1&res=9507E0DF1F3BE633A25754C0A9649D946296D6CF&oref=slogin
- For the benefit mainly of the legal profession in this age of hurry in bustle may I be permitted to coin the word "prepone" as a needed rival of that much revered and oft-invoked standby, "postpone"
- prepone: Stevens, William K. (Mar 19, 1984). Across India, The English Tongue Get New Twist. The New York Times (New York).
- "It is better to make the booking for Tuesday rather than Wednesday so that later you would not have to prepone it," the reservations clerk said...
- —Kruton 16:56, 27 March 2008 (UTC)
Earliest Usenet uses via Google Groups:
- prepone: net.puzzle - May 18 1985, 8:37 am by P.VERMA
- In India, the opposite of "postpone" is widely accepted to be "prepone". Even newspapers use this apparently correct word. However, I have not been able to locate it in any dictionary.
- preponed: soc.culture.indian - Dec 19 1989, 6:18 am by Neeraj Bhatnagar
- Tuesday Morning (purposefully preponed by a day)
- preponement: soc.culture.indian - Dec 19 1989, 6:18 am by Neeraj Bhatnagar
- So long till the next Tuesday (and no preponement next time), Neeraj Bhatnagar
- preponing: rec.travel - Jan 24 1990, 4:12 am by Jordan Hayes
- A friend told me that according to a recent New York Times article, Indian Airlines was arbitrarily cancelling, postponing, and preponing flights, and this had caused at least one riot in India.
- prepones: alt.politics.homosexuality - Jan 21 1997, 10:02 am by Brian Stanley
- And I disagree with your analysis here. To the extent contingent being is our problem, God merely postpones (or rather prepones, or better extrapones ... hmmm) it, obviously.
— Hippietrail 12:47, 12 May 2005 (UTC)