I would think that 10^6 years would produce more than one date (1999) since 1889 for a full moon in February.

Isn't there an algorithm to calculate such trivia?

Generally if an error is posted on most of the www BBS's there will be a lot of shots taken, and if it is an autour with books to sell he gets a lot of free advertising.

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Do nothing simply when a way can be found to make it complex and worderful.