#Taking the values one at a time, and assigning to variables
$DOBYear = $ayDOB_Year[$i];
$DOBMonth = $ayDOB_Month[$i];
$DOBDay = $ayDOB_Day[$i];

#Concatonating the string
$ODBCDate = sprintf("%4d-%02d-%02d", $DOBYear, $DOBMonth, $DOBDay);