Olimex MOD-RTC PCF8536 Real Time Clock Module

Clock - A device used for telling the time

Day - The time it takes a planet or other space objects to complete one rotation.

Month - A period of time originally related to the phases of the earths moon.

Year - The time it takes the planet earth to orbit the sun. This takes around 365.25 days.

Year - 365 days (366 days in a leap year), the time taken for planet earth to make one full revolution around the sun.

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