DATIME_24H
if (check_hour & DATIME_24H) {
bootpref[ARRAY_DATIME] &= ~DATIME_24H;
check_hour |= DATIME_24H;
if (check_hour & DATIME_24H) {
bootpref[ARRAY_DATIME] |= DATIME_24H;
check_hour |= DATIME_24H;
if (fmt & DATIME_24H) {
switch (fmt & ~DATIME_24H) {