function DATE.DMY (d, m, y) = expr_ymd_to_date (y, m, d);
function DATE.MDY (m, d, y) = expr_ymd_to_date (y, m, d);
function DATE.MOYR (m, y) = expr_ymd_to_date (y, m, 1);
function DATE.DMY (d, m, y) = expr_ymd_to_date (y, m, d);
function DATE.MDY (m, d, y) = expr_ymd_to_date (y, m, d);
function DATE.MOYR (m, y) = expr_ymd_to_date (y, m, 1);