On Monday, December 3, 2018 at 11:56:20 AM UTC-8, Gerald Kelleher wrote:

Here is a new planet with instrumentation sent by humans with the necessity to create a timekeeping system with its own features that are not arbitrary like a leap day correction within a Martian year, a Martian 24 hour day/night cycle anchored to noon with an integer of hours reflecting 15 degrees geography/geometry and all the other things that work so well on Earth.

https://en.wikipedia.org/wiki/Timekeeping_on_Mars

"The average length of a Martian sidereal day is 24 h 37 m 22.663 s (88,642..66300 seconds based on SI units), and the length of its solar day (often called a sol) is 24 h 39 m 35.244147 s (88,775.244147 seconds). The corresponding values for Earth are currently 23 h 56 m 4.0916 s and 24 h 00 m 00.002 s, respectively. This yields a conversion factor of 1.02749125170 days/sol. Thus Mars' solar day is only about 2.7% longer than Earth's."