Per MySQL docs
(http://dev.mysql.com/doc/refman/5.7/en/date-and-time-types.html):
"MySQL permits you to store a “zero” value of '0000-00-00' as a
“dummy date.” This is in some cases more convenient than using NULL
values, and uses less data and index space. To disallow '0000-00-00',
enable the NO_ZERO_DATE mode.
“Zero” date or time values used through Connector/ODBC are converted
automatically to NULL because ODBC cannot handle such values."
As we are not using Connector/ODBC we need to handle this ourself.
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