EDIT : stupid me : it's an excel limitation in output, not an alteryx limitation :( Can you please delete this idea ? I had to convert some string into dates and I get this error message (both with select tool and DateTime tool) :
ConvError: Output Data (10): Invalid date value encountered - earliest date supported is 12/31/1899 error in field: DateMatch record number: 37399
This is way too early. Just think to birthdate or geological/archeological data !
Also : other products such as Tableau supports earlier dates!