Movement related to temperature

Where would I find information about how to turn this into a string so I don't have to have so many lines of code

    DateTime now = rtc.now();
    sdFile.print(now.month(), DEC);
    sdFile.print('/');
    sdFile.print(now.day(), DEC);
    sdFile.print('/');
    sdFile.print(now.year(), DEC);
    sdFile.print("  ");
    sdFile.print(now.hour(), DEC);
    sdFile.print(':');
    sdFile.print(now.minute(), DEC);
    sdFile.print(':');
    sdFile.print(now.second(), DEC);
    sdFile.println();
    delay(10000);   
    sdFile.close(); // close the file