Also, I believe if we're being pedantic, this causes issues: > However, because the Moon (and to a lesser extent the other planets) cause the motion of the Ear

Also, I believe if we're being pedantic, this causes issues: > However, because the Moon (and to a lesser extent the other planets) cause the motion of the Earth to vary from a perfect ellipse, the equinox is now officially defined by the Sun's more regular ecliptic longitude rather than by its declination. The instants of the equinoxes are currently defined to be when the longitude of the Sun is 0° and 180°.[4] There are tiny (up to 1¼ arcsecond) variations in the Sun's latitude (discussed below), which means the Sun's center is rarely precisely over the equator under the official definition. The two understandings of the equinox can lead to discrepancies of up to 69 seconds. https://en.wikipedia.org/wiki/Equinox https://en.wikipedia.org/wiki/Equinox