void menu_option_set_date( state_t* currentState ){
	#define DAY       0
	#define MONTH     1
	#define YEAR     2
	
	static uint8_t tempDate[3]; //= {rtc_data[4],rtc_data[5],rtc_data[6]};
	
	static uint8_t mode=DAY;
	
	static char writeOnce = 1;
	if(writeOnce){
		lcd_clearf();
		//lcd_clear();
		lcd_setcursor(1,1);
		lcd_string("option_set_date");
		
		tempDate[DAY] = rtc_data[4];
		tempDate[MONTH] = rtc_data[5];
		tempDate[YEAR] = rtc_data[6];
		
		lcd_setcursor(2,1);
		lcd_zahl(tempDate[DAY],2,'m');
		lcd_data('.');
		lcd_zahl(tempDate[MONTH],2,'m');
		lcd_data('.');
		lcd_zahl(tempDate[YEAR],2,'m');
		
		writeOnce--;
	}
	
	// Werte erhöhen / verringern
	
	if(currentState->input == KEY_UP_S){
		tempDate[mode]++;
	} else if (currentState->input == KEY_DOWN_S) {
		tempDate[mode]--;
	} else if (currentState->input == KEY_LEFT_S) {
		if (mode == DAY)
			mode = YEAR;
		else
			mode--;
	} else if (currentState->input == KEY_RIGHT_S) {
		if (mode == YEAR)
			mode = DAY;
		else
			mode++;
	}
	
	if(tempDate[DAY]<1)
		tempDate[DAY]=31;
	if(tempDate[DAY]>31)
		tempDate[DAY]=1;
	if(tempDate[MONTH]<1)
		tempDate[MONTH]=12;
	if(tempDate[MONTH]>12)
		tempDate[MONTH]=1;
	if(tempDate[YEAR]==255)
		tempDate[YEAR]=40;
	if(tempDate[YEAR]>40)
		tempDate[YEAR]=1;
	
	// Ausgeben der aktuellen temporären Werte
	lcd_setcursor(2,1);
	lcd_zahl(tempDate[DAY],2,'m');
	lcd_data('.');
	lcd_zahl(tempDate[MONTH],2,'m');
	lcd_data('.');
	lcd_zahl(tempDate[YEAR],2,'m');
	
	// Abspeichern der temporären Werte in RTC, bestätigt mit OK
	if(currentState->input == KEY_RIGHT_L){
		RTC_write_Date(tempDate[DAY],tempDate[MONTH],tempDate[YEAR]);
		lcd_setcursor(2,12);
		lcd_data('O');
		lcd_data('K');
	} else if (currentState->input != KEY_NULL){
		lcd_setcursor(2,12);
		lcd_data(' ');
		lcd_data(' ');
	}
		
	
	if(currentState->input == KEY_LEFT_L){
		writeOnce = 1;
		currentState->function = menu_option_date;
	}
};