#include "RTClib.h"
RTC_DS1307 rtc;
char daysOfTheWeek[7][12]={"Sunday","monday","tuesday","wednesday","thursday","friday","saturday"};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  if (!rtc.begin()){
    Serial.println("error");
    Serial.flush();
    abort();
  }
   
}

void loop() {
  // put your main code here, to run repeatedly:
  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(now.hour(),DEC);
  Serial.print(':');

  Serial.print(now.minute(),DEC);
  Serial.print(':');

  Serial.print(now.second(),DEC);
  Serial.println();

  DateTime future (now +TimeSpan(7,24,60,60));
  Serial.print(" now + 7d + 24h + 60m + 60s : ");
  Serial.print(future.year(),DEC);
  Serial.print('/');

  Serial.print(future.month(),DEC);
  Serial.print('/');

  Serial.print(future.day(),DEC);
  Serial.print(':');

  Serial.print(future.minute(),DEC);
  Serial.print(':');

  Serial.print(future.second(),DEC);
  Serial.println();
  Serial.println();
  delay(3000);


}