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The last KDnuggets Poll looked back a year and asked
        In your current data mining practice, what percentage of date
fields is still affected by Y2K bug?

The results (see www.kdnuggets.com/polls/2000/y2k_bug.htm)  of the poll
suggest that Y2K bug was mostly fixed. However, in my experience, some
historical databases still have 2-digit years which may pose a special
problem for data miners who work with such databases.