Puzzle #168: Date & Time Puzzle

Consider a date and time in YY-MM-DD hh:mm format with hh a 24-hour range. What is the first date in a century where all digits are different?

Submit your answer to Gene Wirchenko <genew@telus.net>. Your answer should be in the form of a proof. That means to show how your answer must be correct. The deadline is Wednesday, August 24, 2016 at noon Pacific Time. I will post the answer shortly after.

One thought on “Puzzle #168: Date & Time Puzzle

  1. Karen Ferguson

    I don’t know how to do a proof but I do know that the answer I have has a year much earlier than the answer published in our local paper. 34-06-27 18:59

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