MER_MN
if ($2 == MER_NOON || $2 == MER_MN) {
case MER_MN : param->yyHour = 0; break;
if ($4 == MER_NOON || $4 == MER_MN) {
case MER_MN : param->yyHour = 0; break;
if ($6 == MER_NOON || $6 == MER_MN) {
case MER_MN : param->yyHour = 0; break;
| tTIME { $$ = $1 == 0 ? MER_MN : MER_NOON; }