If you bought Real Time Clock Module 2(RTC) for your Arduino somewhere on the internet, you maybe asked the question: where is the library for this thing?
The answer is simple: on GitHub.
Just download zip-file and install it to your Arduino library in folder named DS1302.
Then connect red wire to VCC and +5V on your Arduino, black — to the GND and to the Arduino’s ground.
(bradeboard image you can find on examples/breadboard.png)
Connect yellow wire to RST pin on your RTC and to Digial 5 on your Arduino;
Connect blue wire to DAT pin and to Digial 6;
Connect green to CLK pin and to Digial 7;
Then go to your DS1302 folder and run set_clock.ino from /examples/set_clock/ folder
Don’t forget to set up correct date on line: Time t(2013, 9, 22, 1, 38, 50, Time::kSunday)