FIRST_DOW
dow = tm->tm_wday -FIRST_DOW;
set_range(e->dow, FIRST_DOW, LAST_DOW, FIRST_DOW,
set_range(e->dow, FIRST_DOW, LAST_DOW, FIRST_DOW,
set_element(e->dow, FIRST_DOW, LAST_DOW, FIRST_DOW);
set_range(e->dow, FIRST_DOW, LAST_DOW, FIRST_DOW,
set_range(e->dow, FIRST_DOW, LAST_DOW,
FIRST_DOW, LAST_DOW, 1);
ch = get_list(e->dow, FIRST_DOW, LAST_DOW,
#define DOW_COUNT (LAST_DOW - FIRST_DOW + 1)