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I entered a few dates in YYYY-MM-DD format and it seems like it does whatever it wants with them?

Some results are without the first 2 year digits.

Some results are plain bogus, a 2012-03-XX date returned a 2012-10 number (without the day component and wrong month).

If this is an ad for the power of Wolfram Alpha it is very poorly executed.

Why does this upset you? The algorithm will be something like:

) Consider 1st billion digits of pi ) Search your exact date string ) If it doesn't hit, try reformatting and search again until something hits ) Return

If you're suggesting they should replace the 'try reformatting' step with 'try the next billion digits', then the complexity of calculating digits increases as you go so this is going to become impractical in any language, not just Wolfram

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