static char s_date_format[64] = "%2:02d/%3:02d/%1:4d";

void   SetDateFormat(const char *fmt)
{
	strncpy(s_date_format, fmt, 63);
}

String   Format(Date date) {
	String  s;
	if(IsNull(date))
		return String();
	return Format(s_date_format, date.year, date.month, date.day, DayOfWeek(date));
}