Fundamental unit of human timekeeping

The first time this insight appeared in written form was the Canopus
Decree -


".. on account of the procession of the rising of the Divine Sothis by
one day in the course of 4 years,.. therefore it shall be, that the
year of 360 days and the 5 days added to their end, so one day shall
be from this day after every 4 years added to the 5 epagomenae before
the new year, whereby all men shall learn, that what was a little
defective in the order as regards the seasons and the year, as also
the opinions which are contained in the rules of the learned on the
heavenly orbits, are now corrected and improved" Canopus Decree

http://www.reshafim.org.il/ad/egypt/...pus_decree.htm

The sighting of Sirius from behind the glare of the central Sun as a
consequence of the orbital motion of the Earth constitutes the
fundamental unit of timekeeping in that it refers the number of
rotations coincident with the star's annual appearance - the accuracy
of the observation being that the completion of an annual circuit does
not happen consistently after 365 rotations but will take an
additional rotation after 4 cycles from whatever starting point is
chosen.

Using the return of an external star prohibits using the daily return
of a star in stellar circumpolar motion as a means to interpret
planetary dynamics as the secondary reference for human timekeeping
are the natural noon variations covering 1461 rotations in 4 orbital
circuits which reduces to trivia as 365 1/4 rotations to one orbital
circuit.

Genuine astronomers will have no objections whereas empirical Ra/Dec
observers insist on 1465 rotations for 4 orbital circuits and that is
not just wrong,it is a cruelty that must stop.