Arduino microcontrollers themselfs are terrible at keeping time. If you were try and do this accuratly then need to use something called a Real Time Clock or RTC for short.
These take all the pain out of keeping time including what day it is as the DS1307 has full calendar capablities as well!

  • I2C Serial Interface
  • Real-Time Clock Counts Seconds, Minutes, Hours, and calender
  • leap-year compensation up to 2100
  • 24 or 12 hour format
  • 56 bytes of non-volatile RAM (DS1307)
  • AT24C32 32KBit (8KByte) I2C EEPROM memory
  • CR2032 Back Up battery holder (battery not included)
  • 3.3V and 5.0V compatible
  • Dimension: 27mm * 28mm * 8.4mm

Files:

(MOD5507)

SKU MOD5507
Barcode # MOD5507
Shipping Weight 0.0080kg
Shipping Width 0.030m
Shipping Height 0.010m
Shipping Length 0.030m
Shipping Cubic 0.000009000m3

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