The Terra Clock System was the time system used on Earth. Since almost all clock systems match up with a "24-hour" colomarin, this is a very commonly used time system, even after Earth's destruction. The format for signifying the current time in a Terra Clock System is (Hour : Minute), and for more specfic times, (Hour : Minute : Second).
Main Units of TimeEdit
Hour - Equal to two millimarins.
Minute - Equal to one micromarin.
Second - 1/60 of a minute.
Millisecond - 1/1000 of a second.