Solar term
Autumn Equinox
Autumn Equinox falls on September 23, 2027 — one of the twenty-four solar terms that keep the Chinese calendar aligned with the sun.
The day itself
A Success day. — Finish it. Deliver, ship, hand over — completion is what this day rewards. Day score 71 of 99.
What a solar term is
The sun moves 15° between terms. They mark the seasons rather than the moon, which is why the almanac's month pillar changes at a term rather than on the first of a Gregorian month.