On Tuesday, February 27, 2018 at 7:34:01 AM UTC-7, Gerald Kelleher wrote:

NB - Once astronomers are conceptually bound to the astronomical event where any
star close to the orbital plane will skip a first annual appearance after the
4th cycle of 365 days, they are bound to the proportions of rotations to orbital
circuits close to 1461 rotations to 4 orbital circuits or 365 1/4 rotations to
one circuit. The Precession of the Equinoxes as a result that it is not exactly
365 1/4 rotations per circuit.

As it is not exactly 365 1/4 rotations per cycle of the seasons, we have given
up the Julian calendar for the Gregorian one.

It is _also_ not exactly 365 1/4 rotations per cycle of the stars in the night
sky.

But the *precession of the equinoxes* is due to the difference between the
*cycle of the seasons* (in which the equinoxes are set) and the stars of the
night sky (against which they precess) and the number of days either one of
those things take - except for the difference between the two - is quite
irrelevant.

The equinoxes would still precess, given that those two cycles are different,
even if one of them took an exact number of days. (Or both of them, and they
differed by a whole day, but then the equinoxes would precess a lot faster.)

That is why the song is about the dawning of "The Age of Aquarius" and not "The
Age of March 23rd".

John Savard