S_MDAY
state |= S_WDAY | S_MON | S_MDAY | S_YEAR;
state |= S_MON | S_MDAY | S_YEAR;
state |= S_MON | S_MDAY | S_YEAR;
state |= S_MON | S_MDAY | S_YEAR;
state |= S_MDAY;
S_MON | S_MDAY | S_YEAR;
state |= S_MDAY;
#define HAVE_MDAY(s) (s & S_MDAY)