J_WEEK_LEN
((julian ? J_WEEK_LEN : WEEK_LEN) - len) / 2, "",
center(lineout, J_WEEK_LEN * 2 + J_HEAD_SEP, 0);
center(month_names[month], J_WEEK_LEN, J_HEAD_SEP);
center(month_names[month + 1], J_WEEK_LEN, 0);
p = lineout + which_cal * (J_WEEK_LEN + 2);