#include <RTClib.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
RTC_DS3231 rtc;
char t[32];

void setup()
{
  lcd.init();
  lcd.backlight();

  Serial.begin(9600);
  Wire.begin();
  rtc.begin();
  rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));
  //rtc.adjust(DateTime(2019, 1, 21, 5, 0, 0));
 
}
void loop()
{
  DateTime now = rtc.now();
  sprintf(t, "%02d:%02d:%02d %02d/%02d/%02d", now.hour(), now.minute(), now.second(), now.day(), now.month(), now.year());  
  Serial.print(F("Date/Time: "));
  Serial.println(t);


lcd.setCursor(0, 1); // clear disly in each sec

lcd.print(F("Date/Time: "));
 

lcd.println(t);

delay(1000);
 
}