Display current date, hour, second with RTC and LCD Arduino

rtctolcd.c

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>


RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27,20,4);

void setup()
{
  lcd.init();                      
  lcd.backlight();
 
  
  Wire.begin();
  rtc.begin();
   
  rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));


}

void loop()
{
    DateTime now = rtc.now();

    lcd.setCursor(0, 1);

    // bye default using UTC time   
    // add +7 for your local time     
    lcd.print(now.hour()+7, DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC);
    lcd.setCursor(0, 1);
}