At the same time the Greenwich meridian rotates to noon, its opposite longitude turns through a new 24 hour cycle as a new day begins and an old day ends in a convenient location away from most habitation. The great cycle where AM transitions to PM for meridians within a 15 degree range centered in London is complimented by the singular 180 E and 180 W meridian where one 24 hour day turns into the next so that one rotation also follows the next rotation. The flexibility of timekeeping and the Lat/Long system is another jewel in the continuous and seamless days/rotations itself until it meets the orbital component of the year/leap year.

https://earthsky.org/astronomy-essen...universal-time

One of the oldest questions is how does a person who has grown hard and cold through experience recover their innocence and inspiration as they did when they were younger, not the childish or those of pretense but those who have journeyed through life, whether rich of not, while coming to understand what really matters. It happens that those who project themselves as bigger than the topic they are discussing also consider themselves bigger than the heritage they inherited so they rarely see where certain groups jump the tracks by overreaching or by being careless.

To re-discover human timekeeping and its close proximity to the dynamics and cycles of the planet is an opportunity to undo some wrongs by approaching a new system for Mars with its own particular Martian hours,minutes and seconds within a larger calendar framework that links rotations to orbital circuits.