Fundamental unit of human timekeeping

How the great timekeeping systems came to be is a source of admiration
for all those who love astronomy and there is even room for taking
notice of the recent mistake,albeit a few centuries old,which
overreached with the AM/PM system and tried to drop the relationship
with the Lat/Long system where planetary geometry and timekeeping
mesh.

I am not isolated in all this as I keep the company of astronomers
who,despite being historically cut off from each other,developed the
great timekeeping systems that we use as a matter of practicality
without really taking notice of the great cycles and the references
that supply these jewels of human ingenuity.Our bodies respond to the
daily and annual cycles so when an ideology comes along which stresses
an unnatural asymmetry between the 24 hour day and a rotation in terms
of experienced effects,the human response to the artificial ideology
should be immediate and decisive.

I am a Christian so all talent,creative or interpretative, belongs to
God and never to the person who uses it so that it is the Universal
acting through the individual that makes the difference rather than
the individual trying to speak for the Universal as though it were
separate.