"Both hot and cold until the days of Higan." So they say in Japan during both the autumn and spring equinoxes.
In the calendar, this day is designated as the Day of the Autumnal Equinox (Shu-bun-no Hi), but Japan celebrates not so much a unique astronomical phenomenon as it performs the rites of the Buddhist holiday Higan, which go back to the depths of history. According to the Law “On National Holidays”, on the day of the autumn equinox, which is a public holiday, the corresponding meaning is also embedded: “Respect the ancestors, honor the memory of those who have gone to another world.”
Legislatively, the day for the celebration was established in 1948, and it falls, as Japanese sources say, "about September 23." The exact date of the autumn equinox for the next year is determined by the National Observatory on February 1 of the current year, making the appropriate celestial measurements and calculations. Astronomers have already calculated that from 2012 to 2044, the Autumnal Equinox falls on September 22 in leap years, and on September 23 in ordinary years.