#include<RTClib.h>

RTC_DS1307 rtc;

char daysofTheWeek[7][12]={"SUNDAY","MONDAY","TUESDAY","WEDNEDAY","THRUSDAY","SATURDAY"};
void setup()
{
  Serial.begin(57600);
  if(!rtc.begin())
  {
    Serial.println("couldn't find RTC");
    Serial.flush();
    abort();
  }
  if(!rtc.isrunning())
  {
    Serial.println("RTC is not running,please set the time");
    rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));
  }
}
void loop()
{
  DateTime now=rtc.now();
  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.print();
  Serial.print("since midnight");
  Serial.print(now.unixtime());
  Serial.print("s=");
  Serial.print(now.unixtime()/86400L);
  Serial.println("d");
  DateTime future(now+Timespan(7,12,30,6));
  Serial.print("now+7d+12h+30m+6s:");
  Serial.print(future.year(),DEC);
  Serial.print('/');
  Serial.print(future.month(),DEC);
  Serial.print("/");
  Serial.print(future.day(),DEC);
  Serial.print("");
  Serial.print(future.hour(),DEC);
  Serial.print(":");
  Serial.print(future.minute(),DEC);
  Serial.print(":");
  Serial.print(future.second(),DEC);
  Serial.println();

  Serial.println();
  delay(3000);
}


}