gregorian_from_fixed
gregorian_from_fixed(floor(t), &date);
gregorian_from_fixed(rd, &gdate);
gregorian_from_fixed(newyear, &gdate);
gregorian_from_fixed(floor(t_jq), &gdate);
gregorian_from_fixed(dp->rd, &gdate);
gregorian_from_fixed(Options.day_begin, &date);
void gregorian_from_fixed(int rd, struct date *date);
gregorian_from_fixed(Options.today, &date);
gregorian_from_fixed(rd, &gdate);
gregorian_from_fixed((int)floor(t_newmoon), &date);
gregorian_from_fixed((int)floor(t_event), &date);
gregorian_from_fixed((int)floor(t), &date);