#include "RTClib.h"

RTC_DS1307 rtc;

#include <LiquidCrystal_I2C.h>
  LiquidCrystal_I2C lcd=LiquidCrystal_I2C(0x27, 16, 2);

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup () {
  pinMode(4,INPUT);
  lcd.init();
  Serial.begin(115200);

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
}

void loop () {
  if(digitalRead(4)==HIGH)
  {
  DateTime now = rtc.now();

  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
   Serial.print("Time :");
      if(now.hour()<=12)
   Serial.print(now.hour(), DEC);
   else
    Serial.print(now.hour()-12, DEC);
  
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  lcd.print("Time:");
      if(now.hour()<=12)
   lcd.print(now.hour(), DEC);
   else
    lcd.print(now.hour()-12, DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
   if(now.hour()<=12)
   lcd.print( " AM");
   else
    lcd.print(" PM");
  lcd.println();
   


  Serial.println();
  delay(1000);
  lcd.clear();
}
else
  {
  DateTime now = rtc.now();

  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
   Serial.print("Time :");
   
   Serial.print(now.hour(), DEC);
   
  
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  lcd.print("Time:");
      
   lcd.print(now.hour(), DEC);
   
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  
  lcd.println();
   


  Serial.println();
  delay(1000);
  lcd.clear();
}
}