Moreover, 5V and GND can be taken from there, where you took them to the LCD display, and can be connected as shown in the figure. Given that we already have connected the display and clock module, you can download to your arduino example below. After loading the display should light up and show the current date and time.

Skecth example:

// include the library code:
#include <LiquidCrystal.h>
#include <Wire.h>
#include "RTClib.h"

// LCD ��� ���������� ��������
#define PWM_LED_PIN 3 
// LCD ������ ����
#define PIN_LCD_RS 39
#define PIN_LCD_EN 41
#define PIN_LCD_D4 43
#define PIN_LCD_D5 45
#define PIN_LCD_D6 47
#define PIN_LCD_D7 49

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd( PIN_LCD_RS, PIN_LCD_EN, PIN_LCD_D4, PIN_LCD_D5, PIN_LCD_D6, PIN_LCD_D7 );
RTC_DS1307 RTC;

void setup() {   
  analogWrite( PWM_LED_PIN, 255 );
  
  lcd.begin(16, 2); 
  lcd.print("House4u sol.proj");
  lcd.setCursor(0, 1); 
  
   Wire.begin();
   RTC.begin();
   
   RTC.adjust(DateTime(__DATE__, __TIME__));
}

void loop() 
{   
    lcd.setCursor(0, 1);
    DateTime now = RTC.now();
    lcd.print(now.year(), DEC);
    lcd.print('/');
    lcd.print(now.month(), DEC);
    lcd.print('/');
    lcd.print(now.day(), DEC);
    lcd.print(' ');
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC);
    lcd.print(" ");

    delay( 1000 ); 
}

The result of the example:

If you received a similar result - hurray! Can move on...