UNO FUNCTIONING WITHOUT RTC???

 
#include <Wire.h>
 #include <DS1307.h>
 //Modify the following data
 #define TIME_YR    18
 #define TIME_MTH   7
 #define TIME_DATE  30
 #define TIME_DOW   1
 #define TIME_HR    20
 #define TIME_MIN   53
 #define TIME_SEC   30
 char* str[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};//week 
 int rtc[7];
 void showtime()     //
   {
    RTC.get(rtc,true);
   {    
    Serial.print( rtc[6]);         
    Serial.print("-");   
    Serial.print( rtc[5]);
    Serial.print("-");   
    Serial.println( rtc[4]);
   
    Serial.print( rtc[2]); /*HOUR  MIN SEC */   
    Serial.print(":");
    Serial.print( rtc[1]);
    Serial.print(":");    
    Serial.println( rtc[0]);
    
    Serial.println( str[rtc[3]-1]); /***WEEK**/  
    Serial.println("****");        
    }  
   }
 void setup()
 {  Serial.begin(9600); 
   Wire.begin();
  }

 void loop()
 { 
     showtime();    //Output data from serial port
    delay(1000);
 }