I don't understand the statement that 12:34:56 7/8/9 will only happen once in history. Because the year is ambiguous wouldn't this same sequence also occur on 12:34:56 7/8/[100]9? In other words, any year ending in 9 (e.g., 1009, 109, 1209, etc.) would also produce this sequence as long as the year is specified only with one number.