counter help

Hi guyz i want to make a timer using avr microcontroller actually i want to note the timing for how much a particular machine is on and when it turns off and save its log the problem is i want to note the time for a complete day if the machine remains on for whole day so is there any I.C which can help in this task or any other technique plz help me

RTC - real time clock chip... https://www.digikey.com/product-sea...s/clock-timing-real-time-clocks/2556170?k=rtc