Example of creating various Daylight Savings Calc Rule objects. int main() { using namespace boost; using namespace local_time; using namespace gregorian; /***** create the necessary date_generator objects *****/ // starting generators first_day_of_the_week_in_month fd_start(Sunday, May); last_day_of_the_week_in_month ld_start(Sunday, May); nth_day_of_the_week_in_month nkd_start(nth_day_of_the_week_in_month::third, Sunday, May); partial_date pd_start(1, May); // ending generators first_day_of_the_week_in_month fd_end(Sunday, Oct); last_day_of_the_week_in_month ld_end(Sunday, Oct); nth_day_of_the_week_in_month nkd_end(nth_day_of_the_week_in_month::third, Sunday, Oct); partial_date pd_end(31, Oct); /***** create the various dst_calc_rule objects *****/ dst_calc_rule_ptr pdr(new partial_date_dst_rule(pd_start, pd_end)); dst_calc_rule_ptr flr(new first_last_dst_rule(fd_start, ld_end)); dst_calc_rule_ptr llr(new last_last_dst_rule(ld_start, ld_end)); dst_calc_rule_ptr nlr(new nth_last_dst_rule(nkd_start, ld_end)); dst_calc_rule_ptr ndr(new nth_day_of_the_week_in_month_dst_rule(nkd_start, nkd_end)); return 0; } ]]>