Abstract: A self adjusting clock system operable to provide a uniform time display on clocks throughout a facility including a master time-keeper, a plurality of slave time-keepers, and a time-keeping correction apparatus for correcting time of the slave time-keepers in accordance with the master timekeeper. The master time-keeper keeps the correct time and is operable to generate a master signal representative of a time correction. This master signal is then received by the time-keeping correction apparatus and analyzed in combination with other applicable information. The time-keeping correction apparatus supplies a slave correction signal to the slave time-keepers. The slave time-keepers independently keep and display the slave time-keeper time and respond to the slave correction signal to correct their slave time-keeper time when it deviates from the correct time kept by the master time-keeper.