Nastavte 'Zero Datetime=True' v konfiguračním souboru aplikace
<add name="CONNECTIONSTRINGNAME" connectionString="server's HOSTNAMEorIP(i.e Localhost or IP address);user id=USER_ID;Pwd=PASSWORD;persistsecurityinfo=True;database=DATABASENAME;Convert Zero Datetime=True" providerName="MySql.Data.MySqlClient"/>