how to calibration ds1307 in data logger shield

can you help me, i have rtc ds1307 in data logger shield, but the time is not same with my refernce in https://time.is. my rtc is to late 10 second. my question is can i add 10 second to be same by using float 10 ? if no what the solution. now, i use example from timelib. thank you

If you use the RTCLib library (which supports the DS1307 and several others) there is an adjust() method to alter the value of your RTC.