#include <LiquidCrystal.h>
#include <RTClib.h>

RTC DS1307 RTC;

void setup() {
     serial.begin(9600);
     Wire.begin();
     RTC.begin();
     RTC.adjust(DateTime(2022,1,11,15,15,15));
}

void loop() {
    DateTime now = RTC.now();
    lcd,setCursor(4,0);
    lcdData(now.year());
    lcd.print('-');
    lcdData(now.month());
    lcd.print('-');
    lcdData(now.day());
    lcd,setCursor(4,1);
    IcdData(now.hour());
    lcd.print(':');
    lcdData(now.minute());
    lcd.print(':');
    lcdData(now.second());
}

void lcdData(uint8_t data){
  if(data<10)
  {
    lcd.print(0);
    lcd.print(data);
  }
  else{
    lcd.print(data);
  }
}