There are ideas of redesigning calendar: https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/

There are ideas of redesigning calendar: https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/wiki/World_Calendar https://en.wikipedia.org/wiki/World_Calendar https://en.wikipedia.org/wiki/Symmetry454 https://en.wikipedia.org/wiki/Symmetry454 and ideas for time keeping on other planets like https://en.wikipedia.org/wiki/Darian_calendar https://en.wikipedia.org/wiki/Darian_calendar https://ops-alaska.com/time/gangale_mst/abstract.htm https://ops-alaska.com/time/gangale_mst/abstract.htm